51049931 has 2 divisors, whose sum is σ = 51049932. Its totient is φ = 51049930.

The previous prime is 51049919. The next prime is 51049937. The reversal of 51049931 is 13994015.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51049931 - 2¹⁴ = 51033547 is a prime.

It is a super-2 number, since 2×51049931² = 5212190910209522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51049937) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25524965 + 25524966.

It is an arithmetic number, because the mean of its divisors is an integer number (25524966).

Almost surely, 2^51049931 is an apocalyptic number.

51049931 is a deficient number, since it is larger than the sum of its proper divisors (1).

51049931 is an equidigital number, since it uses as much as digits as its factorization.

51049931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 51049931 is about 7144.9234425570. The cubic root of 51049931 is about 370.9639607250.

The spelling of 51049931 in words is "fifty-one million, forty-nine thousand, nine hundred thirty-one".