251511115152 has 40 divisors (see below), whose sum is σ = 708804053280. Its totient is φ = 76215489280.

The previous prime is 251511115151. The next prime is 251511115157.

251511115152 is nontrivially palindromic in base 10.

251511115152 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (251511115151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238172877 + ... + 238173932.

It is an arithmetic number, because the mean of its divisors is an integer number (17720101332).

Almost surely, 2^251511115152 is an apocalyptic number.

251511115152 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

251511115152 is an abundant number, since it is smaller than the sum of its proper divisors (457292938128).

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

251511115152 is a wasteful number, since it uses less digits than its factorization.

251511115152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476346831 (or 476346825 counting only the distinct ones).

The product of its digits is 2500, while the sum is 30.

It can be divided in two parts, 251511 and 115152, that added together give a palindrome (366663).

The spelling of 251511115152 in words is "two hundred fifty-one billion, five hundred eleven million, one hundred fifteen thousand, one hundred fifty-two".