51511104 has 84 divisors (see below), whose sum is σ = 151700484. Its totient is φ = 16699392.

The previous prime is 51511091. The next prime is 51511127. The reversal of 51511104 is 40111515.

It is a happy number.

51511104 is a `hidden beast` number, since 51 + 511 + 104 = 666.

51511104 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 48441600 + 3069504 = 6960^2 + 1752^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20104 + ... + 22520.

Almost surely, 2^51511104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51511104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75850242).

51511104 is an abundant number, since it is smaller than the sum of its proper divisors (100189380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51511104 is a wasteful number, since it uses less digits than its factorization.

51511104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2472 (or 2459 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 51511104 is about 7177.1236578451. The cubic root of 51511104 is about 372.0776806213.

Adding to 51511104 its reverse (40111515), we get a palindrome (91622619).

It can be divided in two parts, 51511 and 104, that added together give a palindrome (51615).

The spelling of 51511104 in words is "fifty-one million, five hundred eleven thousand, one hundred four".