251601064 has 32 divisors (see below), whose sum is σ = 554228640. Its totient is φ = 105566400.

The previous prime is 251601061. The next prime is 251601079. The reversal of 251601064 is 460106152.

It is not an unprimeable number, because it can be changed into a prime (251601061) 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, 108822 + ... + 111109.

It is an arithmetic number, because the mean of its divisors is an integer number (17319645).

Almost surely, 2^251601064 is an apocalyptic number.

It is an amenable number.

251601064 is an abundant number, since it is smaller than the sum of its proper divisors (302627576).

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

251601064 is a wasteful number, since it uses less digits than its factorization.

251601064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219961 (or 219957 counting only the distinct ones).

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

The square root of 251601064 is about 15861.9375865624. The cubic root of 251601064 is about 631.3024737740.

The spelling of 251601064 in words is "two hundred fifty-one million, six hundred one thousand, sixty-four".