251015132 has 24 divisors (see below), whose sum is σ = 465637536. Its totient is φ = 117992448.

The previous prime is 251015131. The next prime is 251015147. The reversal of 251015132 is 231510152.

It is a happy number.

It is a super-3 number, since 3×251015132³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251015131) 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, 87188 + ... + 90020.

It is an arithmetic number, because the mean of its divisors is an integer number (19401564).

Almost surely, 2^251015132 is an apocalyptic number.

It is an amenable number.

251015132 is a deficient number, since it is larger than the sum of its proper divisors (214622404).

251015132 is a wasteful number, since it uses less digits than its factorization.

251015132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4157 (or 4155 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 251015132 is about 15843.4570722428. The cubic root of 251015132 is about 630.8120309142.

Adding to 251015132 its reverse (231510152), we get a palindrome (482525284).

The spelling of 251015132 in words is "two hundred fifty-one million, fifteen thousand, one hundred thirty-two".