2551511252 has 6 divisors (see below), whose sum is σ = 4465144698. Its totient is φ = 1275755624.

The previous prime is 2551511201. The next prime is 2551511297. The reversal of 2551511252 is 2521151552.

It can be written as a sum of positive squares in only one way, i.e., 2490608836 + 60902416 = 49906^2 + 7804^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318938903 + ... + 318938910.

It is an arithmetic number, because the mean of its divisors is an integer number (744190783).

Almost surely, 2^2551511252 is an apocalyptic number.

It is an amenable number.

2551511252 is a deficient number, since it is larger than the sum of its proper divisors (1913633446).

2551511252 is a wasteful number, since it uses less digits than its factorization.

2551511252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637877817 (or 637877815 counting only the distinct ones).

The product of its digits is 5000, while the sum is 29.

The square root of 2551511252 is about 50512.4860999733. The cubic root of 2551511252 is about 1366.4670460242.

The spelling of 2551511252 in words is "two billion, five hundred fifty-one million, five hundred eleven thousand, two hundred fifty-two".