51477931 has 2 divisors, whose sum is σ = 51477932. Its totient is φ = 51477930.

The previous prime is 51477847. The next prime is 51477953. The reversal of 51477931 is 13977415.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51477931 - 2¹³ = 51469739 is a prime.

It is a super-2 number, since 2×51477931² = 5299954760081522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51477131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25738965 + 25738966.

It is an arithmetic number, because the mean of its divisors is an integer number (25738966).

Almost surely, 2^51477931 is an apocalyptic number.

51477931 is a deficient number, since it is larger than the sum of its proper divisors (1).

51477931 is an equidigital number, since it uses as much as digits as its factorization.

51477931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26460, while the sum is 37.

The square root of 51477931 is about 7174.8122623522. The cubic root of 51477931 is about 371.9977911573.

The spelling of 51477931 in words is "fifty-one million, four hundred seventy-seven thousand, nine hundred thirty-one".