51972689 has 8 divisors (see below), whose sum is σ = 55093248. Its totient is φ = 48859200.

The previous prime is 51972659. The next prime is 51972703. The reversal of 51972689 is 98627915.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51972689 - 2¹² = 51968593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51972629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25664 + ... + 27614.

It is an arithmetic number, because the mean of its divisors is an integer number (6886656).

Almost surely, 2^51972689 is an apocalyptic number.

It is an amenable number.

51972689 is a deficient number, since it is larger than the sum of its proper divisors (3120559).

51972689 is a wasteful number, since it uses less digits than its factorization.

51972689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3535.

The product of its digits is 272160, while the sum is 47.

The square root of 51972689 is about 7209.2086250850. The cubic root of 51972689 is about 373.1857589741.

The spelling of 51972689 in words is "fifty-one million, nine hundred seventy-two thousand, six hundred eighty-nine".