51185142 has 16 divisors (see below), whose sum is σ = 113744880. Its totient is φ = 17061696.

The previous prime is 51185137. The next prime is 51185153. The reversal of 51185142 is 24158115.

51185142 is a `hidden beast` number, since 511 + 8 + 5 + 142 = 666.

51185142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 7 ways as a sum of consecutive naturals, for example, 473883 + ... + 473990.

It is an arithmetic number, because the mean of its divisors is an integer number (7109055).

Almost surely, 2^51185142 is an apocalyptic number.

51185142 is an abundant number, since it is smaller than the sum of its proper divisors (62559738).

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

51185142 is a wasteful number, since it uses less digits than its factorization.

51185142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947884 (or 947878 counting only the distinct ones).

The product of its digits is 1600, while the sum is 27.

The square root of 51185142 is about 7154.3792183529. The cubic root of 51185142 is about 371.2911840854.

It can be divided in two parts, 51 and 185142, that added together give a cube (185193 = 57³).

The spelling of 51185142 in words is "fifty-one million, one hundred eighty-five thousand, one hundred forty-two".