251713056 has 192 divisors, whose sum is σ = 800464896. Its totient is φ = 67737600.

The previous prime is 251713027. The next prime is 251713061. The reversal of 251713056 is 650317152.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 895636 + ... + 895916.

It is an arithmetic number, because the mean of its divisors is an integer number (4169088).

Almost surely, 2^251713056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 251713056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (400232448).

251713056 is an abundant number, since it is smaller than the sum of its proper divisors (548751840).

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

251713056 is a wasteful number, since it uses less digits than its factorization.

251713056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 251713056 is about 15865.4674056581. The cubic root of 251713056 is about 631.3961277754.

The spelling of 251713056 in words is "two hundred fifty-one million, seven hundred thirteen thousand, fifty-six".