51005651252 has 6 divisors (see below), whose sum is σ = 89259889698. Its totient is φ = 25502825624.

The previous prime is 51005651219. The next prime is 51005651309. The reversal of 51005651252 is 25215650015.

It can be written as a sum of positive squares in only one way, i.e., 28627286416 + 22378364836 = 169196^2 + 149594^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6375706403 + ... + 6375706410.

It is an arithmetic number, because the mean of its divisors is an integer number (14876648283).

Almost surely, 2^51005651252 is an apocalyptic number.

It is an amenable number.

51005651252 is a deficient number, since it is larger than the sum of its proper divisors (38254238446).

51005651252 is a wasteful number, since it uses less digits than its factorization.

51005651252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12751412817 (or 12751412815 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 32.

The spelling of 51005651252 in words is "fifty-one billion, five million, six hundred fifty-one thousand, two hundred fifty-two".