251033030155 has 24 divisors (see below), whose sum is σ = 321015737952. Its totient is φ = 188409321216.

The previous prime is 251033030141. The next prime is 251033030159. The reversal of 251033030155 is 551030330152.

251033030155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-251033030155 is a prime.

It is a super-2 number, since 2×251033030155² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251033030159) 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 23 ways as a sum of consecutive naturals, for example, 489214 + ... + 861043.

It is an arithmetic number, because the mean of its divisors is an integer number (13375655748).

Almost surely, 2^251033030155 is an apocalyptic number.

251033030155 is a deficient number, since it is larger than the sum of its proper divisors (69982707797).

251033030155 is a wasteful number, since it uses less digits than its factorization.

251033030155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350403 (or 1350384 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 28.

The spelling of 251033030155 in words is "two hundred fifty-one billion, thirty-three million, thirty thousand, one hundred fifty-five".