51572913 has 16 divisors (see below), whose sum is σ = 78689280. Its totient is φ = 29432016.

The previous prime is 51572891. The next prime is 51572977. The reversal of 51572913 is 31927515.

It is not a de Polignac number, because 51572913 - 2⁹ = 51572401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51570913) 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, 26508 + ... + 28386.

It is an arithmetic number, because the mean of its divisors is an integer number (4918080).

Almost surely, 2^51572913 is an apocalyptic number.

It is an amenable number.

51572913 is a deficient number, since it is larger than the sum of its proper divisors (27116367).

51572913 is a wasteful number, since it uses less digits than its factorization.

51572913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3196.

The product of its digits is 9450, while the sum is 33.

The square root of 51572913 is about 7181.4283398221. The cubic root of 51572913 is about 372.2264417960.

The spelling of 51572913 in words is "fifty-one million, five hundred seventy-two thousand, nine hundred thirteen".