51927431 has 2 divisors, whose sum is σ = 51927432. Its totient is φ = 51927430.

The previous prime is 51927419. The next prime is 51927451. The reversal of 51927431 is 13472915.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51927431 is a prime.

It is a super-2 number, since 2×51927431² = 5392916180519522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51927451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25963715 + 25963716.

It is an arithmetic number, because the mean of its divisors is an integer number (25963716).

Almost surely, 2^51927431 is an apocalyptic number.

51927431 is a deficient number, since it is larger than the sum of its proper divisors (1).

51927431 is an equidigital number, since it uses as much as digits as its factorization.

51927431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 32.

The square root of 51927431 is about 7206.0690393584. The cubic root of 51927431 is about 373.0774036931.

The spelling of 51927431 in words is "fifty-one million, nine hundred twenty-seven thousand, four hundred thirty-one".