251164555252 has 12 divisors (see below), whose sum is σ = 473348584996. Its totient is φ = 115922102400.

The previous prime is 251164555153. The next prime is 251164555259. The reversal of 251164555252 is 252555461152.

It can be written as a sum of positive squares in 2 ways, for example, as 21075490276 + 230089064976 = 145174^2 + 479676^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 251164555199 and 251164555208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251164555259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2415043749 + ... + 2415043852.

Almost surely, 2^251164555252 is an apocalyptic number.

It is an amenable number.

251164555252 is a deficient number, since it is larger than the sum of its proper divisors (222184029744).

251164555252 is a wasteful number, since it uses less digits than its factorization.

251164555252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4830087618 (or 4830087616 counting only the distinct ones).

The product of its digits is 600000, while the sum is 43.

The spelling of 251164555252 in words is "two hundred fifty-one billion, one hundred sixty-four million, five hundred fifty-five thousand, two hundred fifty-two".