251551352352 has 48 divisors (see below), whose sum is σ = 660440656512. Its totient is φ = 83835421440.

The previous prime is 251551352329. The next prime is 251551352357. The reversal of 251551352352 is 253253155152.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 251551352352.

It is not an unprimeable number, because it can be changed into a prime (251551352357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310102 + ... + 774122.

It is an arithmetic number, because the mean of its divisors is an integer number (13759180344).

Almost surely, 2^251551352352 is an apocalyptic number.

It is an amenable number.

251551352352 is an abundant number, since it is smaller than the sum of its proper divisors (408889304160).

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

251551352352 is a wasteful number, since it uses less digits than its factorization.

251551352352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469681 (or 469673 counting only the distinct ones).

The product of its digits is 225000, while the sum is 39.

The spelling of 251551352352 in words is "two hundred fifty-one billion, five hundred fifty-one million, three hundred fifty-two thousand, three hundred fifty-two".