251132380 has 24 divisors (see below), whose sum is σ = 540242640. Its totient is φ = 98002560.

The previous prime is 251132369. The next prime is 251132383. The reversal of 251132380 is 83231152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251132383) 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, 152310 + ... + 153949.

It is an arithmetic number, because the mean of its divisors is an integer number (22510110).

Almost surely, 2^251132380 is an apocalyptic number.

251132380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251132380 is an abundant number, since it is smaller than the sum of its proper divisors (289110260).

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

251132380 is a wasteful number, since it uses less digits than its factorization.

251132380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306309 (or 306307 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 251132380 is about 15847.1568427904. The cubic root of 251132380 is about 630.9102320807.

The spelling of 251132380 in words is "two hundred fifty-one million, one hundred thirty-two thousand, three hundred eighty".