51506330 has 8 divisors (see below), whose sum is σ = 92711412. Its totient is φ = 20602528.

The previous prime is 51506327. The next prime is 51506333. The reversal of 51506330 is 3360515.

51506330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51506327) and next prime (51506333).

It can be written as a sum of positive squares in 2 ways, for example, as 43309561 + 8196769 = 6581^2 + 2863^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 51506296 and 51506305.

It is not an unprimeable number, because it can be changed into a prime (51506333) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2575307 + ... + 2575326.

Almost surely, 2^51506330 is an apocalyptic number.

51506330 is a deficient number, since it is larger than the sum of its proper divisors (41205082).

51506330 is a wasteful number, since it uses less digits than its factorization.

51506330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5150640.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 51506330 is about 7176.7910656504. The cubic root of 51506330 is about 372.0661856646.

Adding to 51506330 its reverse (3360515), we get a palindrome (54866845).

The spelling of 51506330 in words is "fifty-one million, five hundred six thousand, three hundred thirty".