51772158 has 24 divisors (see below), whose sum is σ = 112483800. Its totient is φ = 17209584.

The previous prime is 51772067. The next prime is 51772181. The reversal of 51772158 is 85127715.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3028 + ... + 10616.

It is an arithmetic number, because the mean of its divisors is an integer number (4686825).

Almost surely, 2^51772158 is an apocalyptic number.

51772158 is an abundant number, since it is smaller than the sum of its proper divisors (60711642).

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

51772158 is a wasteful number, since it uses less digits than its factorization.

51772158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7976 (or 7973 counting only the distinct ones).

The product of its digits is 19600, while the sum is 36.

The square root of 51772158 is about 7195.2872076103. The cubic root of 51772158 is about 372.7051747179.

The spelling of 51772158 in words is "fifty-one million, seven hundred seventy-two thousand, one hundred fifty-eight".