251272675220 has 72 divisors (see below), whose sum is σ = 613904729256. Its totient is φ = 86139196416.

The previous prime is 251272675201. The next prime is 251272675273. The reversal of 251272675220 is 22576272152.

It can be written as a sum of positive squares in 4 ways, for example, as 116298732676 + 134973942544 = 341026^2 + 367388^2 .

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 in 23 ways as a sum of consecutive naturals, for example, 11020472 + ... + 11043248.

It is an arithmetic number, because the mean of its divisors is an integer number (8526454573).

Almost surely, 2^251272675220 is an apocalyptic number.

251272675220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251272675220 is an abundant number, since it is smaller than the sum of its proper divisors (362632054036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251272675220 is a wasteful number, since it uses less digits than its factorization.

251272675220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34057 (or 34048 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 41.

The spelling of 251272675220 in words is "two hundred fifty-one billion, two hundred seventy-two million, six hundred seventy-five thousand, two hundred twenty".