51897572 has 12 divisors (see below), whose sum is σ = 91034496. Its totient is φ = 25887720.

The previous prime is 51897563. The next prime is 51897577. The reversal of 51897572 is 27579815.

It is not an unprimeable number, because it can be changed into a prime (51897577) 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, 13328 + ... + 16775.

It is an arithmetic number, because the mean of its divisors is an integer number (7586208).

Almost surely, 2^51897572 is an apocalyptic number.

It is an amenable number.

51897572 is a deficient number, since it is larger than the sum of its proper divisors (39136924).

51897572 is a wasteful number, since it uses less digits than its factorization.

51897572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30538 (or 30536 counting only the distinct ones).

The product of its digits is 176400, while the sum is 44.

The square root of 51897572 is about 7203.9969461404. The cubic root of 51897572 is about 373.0058817387.

Adding to 51897572 its sum of digits (44), we get a square (51897616 = 7204²).

The spelling of 51897572 in words is "fifty-one million, eight hundred ninety-seven thousand, five hundred seventy-two".