51538472 has 16 divisors (see below), whose sum is σ = 98458740. Its totient is φ = 25282816.

The previous prime is 51538471. The next prime is 51538489. The reversal of 51538472 is 27483515.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 49758916 + 1779556 = 7054^2 + 1334^2 .

It is not an unprimeable number, because it can be changed into a prime (51538471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60353 + ... + 61200.

Almost surely, 2^51538472 is an apocalyptic number.

It is an amenable number.

51538472 is a deficient number, since it is larger than the sum of its proper divisors (46920268).

51538472 is a wasteful number, since it uses less digits than its factorization.

51538472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121612 (or 121608 counting only the distinct ones).

The product of its digits is 33600, while the sum is 35.

The square root of 51538472 is about 7179.0300180456. The cubic root of 51538472 is about 372.1435642740.

The spelling of 51538472 in words is "fifty-one million, five hundred thirty-eight thousand, four hundred seventy-two".