51023538 has 24 divisors (see below), whose sum is σ = 111168876. Its totient is φ = 16912800.

The previous prime is 51023527. The next prime is 51023543. The reversal of 51023538 is 83532015.

It can be written as a sum of positive squares in 2 ways, for example, as 51022449 + 1089 = 7143^2 + 33^2 .

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, 4573 + ... + 11088.

Almost surely, 2^51023538 is an apocalyptic number.

51023538 is an abundant number, since it is smaller than the sum of its proper divisors (60145338).

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

51023538 is a wasteful number, since it uses less digits than its factorization.

51023538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15850 (or 15847 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 51023538 is about 7143.0762280687. The cubic root of 51023538 is about 370.9000197989.

The spelling of 51023538 in words is "fifty-one million, twenty-three thousand, five hundred thirty-eight".