51506892 has 36 divisors (see below), whose sum is σ = 130941720. Its totient is φ = 17070912.

The previous prime is 51506857. The next prime is 51506893. The reversal of 51506892 is 29860515.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (51506893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2448 + ... + 10440.

It is an arithmetic number, because the mean of its divisors is an integer number (3637270).

Almost surely, 2^51506892 is an apocalyptic number.

It is an amenable number.

51506892 is an abundant number, since it is smaller than the sum of its proper divisors (79434828).

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

51506892 is a wasteful number, since it uses less digits than its factorization.

51506892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8182 (or 8177 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 51506892 is about 7176.8302195329. The cubic root of 51506892 is about 372.0675388991.

The spelling of 51506892 in words is "fifty-one million, five hundred six thousand, eight hundred ninety-two".