251132961 has 8 divisors (see below), whose sum is σ = 336977344. Its totient is φ = 166355280.

The previous prime is 251132939. The next prime is 251132963. The reversal of 251132961 is 169231152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 251132961 - 2²⁶ = 184024097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251132963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266125 + ... + 267066.

It is an arithmetic number, because the mean of its divisors is an integer number (42122168).

Almost surely, 2^251132961 is an apocalyptic number.

It is an amenable number.

251132961 is a deficient number, since it is larger than the sum of its proper divisors (85844383).

251132961 is a wasteful number, since it uses less digits than its factorization.

251132961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533351.

The product of its digits is 3240, while the sum is 30.

The square root of 251132961 is about 15847.1751741438. The cubic root of 251132961 is about 630.9107186216.

The spelling of 251132961 in words is "two hundred fifty-one million, one hundred thirty-two thousand, nine hundred sixty-one".