51073013 has 2 divisors, whose sum is σ = 51073014. Its totient is φ = 51073012.

The previous prime is 51072997. The next prime is 51073051. The reversal of 51073013 is 31037015.

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., 37662769 + 13410244 = 6137^2 + 3662^2 .

It is a cyclic number.

It is not a de Polignac number, because 51073013 - 2⁴ = 51072997 is a prime.

It is equal to p_3061550 and since 51073013 and 3061550 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51073073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25536506 + 25536507.

It is an arithmetic number, because the mean of its divisors is an integer number (25536507).

Almost surely, 2^51073013 is an apocalyptic number.

It is an amenable number.

51073013 is a deficient number, since it is larger than the sum of its proper divisors (1).

51073013 is an equidigital number, since it uses as much as digits as its factorization.

51073013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 315, while the sum is 20.

The square root of 51073013 is about 7146.5385327444. The cubic root of 51073013 is about 371.0198622041.

The spelling of 51073013 in words is "fifty-one million, seventy-three thousand, thirteen".