251291121192152 has 16 divisors (see below), whose sum is σ = 471171635802600. Its totient is φ = 125645351644800.

The previous prime is 251291121192149. The next prime is 251291121192169.

251291121192152 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×251291121192152² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 20947502 + ... + 30681917.

Almost surely, 2^{251291121192152} is an apocalyptic number.

It is an amenable number.

251291121192152 is a deficient number, since it is larger than the sum of its proper divisors (219880514610448).

251291121192152 is a wasteful number, since it uses less digits than its factorization.

251291121192152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52237826 (or 52237822 counting only the distinct ones).

The product of its digits is 64800, while the sum is 44.

The spelling of 251291121192152 in words is "two hundred fifty-one trillion, two hundred ninety-one billion, one hundred twenty-one million, one hundred ninety-two thousand, one hundred fifty-two".