51972569 has 16 divisors (see below), whose sum is σ = 58501440. Its totient is φ = 45768960.

The previous prime is 51972563. The next prime is 51972589. The reversal of 51972569 is 96527915.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51972569 - 2⁸ = 51972313 is a prime.

It is a super-2 number, since 2×51972569² = 5402295856919522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51972563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46829 + ... + 47925.

It is an arithmetic number, because the mean of its divisors is an integer number (3656340).

Almost surely, 2^51972569 is an apocalyptic number.

51972569 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

51972569 is a deficient number, since it is larger than the sum of its proper divisors (6528871).

51972569 is a wasteful number, since it uses less digits than its factorization.

51972569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240.

The product of its digits is 170100, while the sum is 44.

The square root of 51972569 is about 7209.2003023914. The cubic root of 51972569 is about 373.1854717571.

The spelling of 51972569 in words is "fifty-one million, nine hundred seventy-two thousand, five hundred sixty-nine".