51235231 has 8 divisors (see below), whose sum is σ = 52684544. Its totient is φ = 49797720.

The previous prime is 51235207. The next prime is 51235241. The reversal of 51235231 is 13253215.

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 51235231 - 2²³ = 42846623 is a prime.

It is a super-2 number, since 2×51235231² = 5250097791246722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51235201) 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, 6250 + ... + 11896.

It is an arithmetic number, because the mean of its divisors is an integer number (6585568).

Almost surely, 2^51235231 is an apocalyptic number.

51235231 is a deficient number, since it is larger than the sum of its proper divisors (1449313).

51235231 is a wasteful number, since it uses less digits than its factorization.

51235231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5901.

The product of its digits is 900, while the sum is 22.

The square root of 51235231 is about 7157.8789456095. The cubic root of 51235231 is about 371.4122578986.

Adding to 51235231 its reverse (13253215), we get a palindrome (64488446).

The spelling of 51235231 in words is "fifty-one million, two hundred thirty-five thousand, two hundred thirty-one".