251113380 has 48 divisors (see below), whose sum is σ = 803564160. Its totient is φ = 57397248.

The previous prime is 251113351. The next prime is 251113403. The reversal of 251113380 is 83311152.

It is a self number, because there is not a number n which added to its sum of digits gives 251113380.

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 15 ways as a sum of consecutive naturals, for example, 298525 + ... + 299364.

It is an arithmetic number, because the mean of its divisors is an integer number (16740920).

Almost surely, 2^251113380 is an apocalyptic number.

251113380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251113380 is an abundant number, since it is smaller than the sum of its proper divisors (552450780).

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

251113380 is a wasteful number, since it uses less digits than its factorization.

251113380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597908 (or 597906 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 251113380 is about 15846.5573548326. The cubic root of 251113380 is about 630.8943206893.

The spelling of 251113380 in words is "two hundred fifty-one million, one hundred thirteen thousand, three hundred eighty".