51983231 has 2 divisors, whose sum is σ = 51983232. Its totient is φ = 51983230.

The previous prime is 51983179. The next prime is 51983251. The reversal of 51983231 is 13238915.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51983231 - 2²² = 47788927 is a prime.

It is a super-2 number, since 2×51983231² = 5404512610398722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51983251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25991615 + 25991616.

It is an arithmetic number, because the mean of its divisors is an integer number (25991616).

Almost surely, 2^51983231 is an apocalyptic number.

51983231 is a deficient number, since it is larger than the sum of its proper divisors (1).

51983231 is an equidigital number, since it uses as much as digits as its factorization.

51983231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 32.

The square root of 51983231 is about 7209.9397362253. The cubic root of 51983231 is about 373.2109892658.

The spelling of 51983231 in words is "fifty-one million, nine hundred eighty-three thousand, two hundred thirty-one".