51373013 has 2 divisors, whose sum is σ = 51373014. Its totient is φ = 51373012.

The previous prime is 51373009. The next prime is 51373033. The reversal of 51373013 is 31037315.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49463089 + 1909924 = 7033^2 + 1382^2 .

It is a cyclic number.

It is not a de Polignac number, because 51373013 - 2² = 51373009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51373013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51373033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25686506 + 25686507.

It is an arithmetic number, because the mean of its divisors is an integer number (25686507).

Almost surely, 2^51373013 is an apocalyptic number.

It is an amenable number.

51373013 is a deficient number, since it is larger than the sum of its proper divisors (1).

51373013 is an equidigital number, since it uses as much as digits as its factorization.

51373013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 945, while the sum is 23.

The square root of 51373013 is about 7167.4969829083. The cubic root of 51373013 is about 371.7448943726.

The spelling of 51373013 in words is "fifty-one million, three hundred seventy-three thousand, thirteen".