51440713 has 2 divisors, whose sum is σ = 51440714. Its totient is φ = 51440712.

The previous prime is 51440699. The next prime is 51440729. The reversal of 51440713 is 31704415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45738169 + 5702544 = 6763^2 + 2388^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51440713 is a prime.

It is a super-2 number, since 2×51440713² = 5292293907896738, which contains 22 as substring.

It is equal to p_3082318 and since 51440713 and 3082318 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (51440783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25720356 + 25720357.

It is an arithmetic number, because the mean of its divisors is an integer number (25720357).

Almost surely, 2^51440713 is an apocalyptic number.

It is an amenable number.

51440713 is a deficient number, since it is larger than the sum of its proper divisors (1).

51440713 is an equidigital number, since it uses as much as digits as its factorization.

51440713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 51440713 is about 7172.2181366715. The cubic root of 51440713 is about 371.9081193863.

The spelling of 51440713 in words is "fifty-one million, four hundred forty thousand, seven hundred thirteen".