51238231 has 16 divisors (see below), whose sum is σ = 59817600. Its totient is φ = 43394400.

The previous prime is 51238223. The next prime is 51238237. The reversal of 51238231 is 13283215.

It is a cyclic number.

It is not a de Polignac number, because 51238231 - 2³ = 51238223 is a prime.

It is a super-2 number, since 2×51238231² = 5250712632018722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51238196 and 51238205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51238237) 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, 10740 + ... + 14758.

It is an arithmetic number, because the mean of its divisors is an integer number (3738600).

Almost surely, 2^51238231 is an apocalyptic number.

51238231 is a deficient number, since it is larger than the sum of its proper divisors (8579369).

51238231 is a wasteful number, since it uses less digits than its factorization.

51238231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4110.

The product of its digits is 1440, while the sum is 25.

The square root of 51238231 is about 7158.0885018278. The cubic root of 51238231 is about 371.4195069146.

The spelling of 51238231 in words is "fifty-one million, two hundred thirty-eight thousand, two hundred thirty-one".