251995125 has 64 divisors (see below), whose sum is σ = 442091520. Its totient is φ = 127296000.

The previous prime is 251995109. The next prime is 251995141. The reversal of 251995125 is 521599152.

It is an interprime number because it is at equal distance from previous prime (251995109) and next prime (251995141).

It is not a de Polignac number, because 251995125 - 2⁴ = 251995109 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 615921 + ... + 616329.

It is an arithmetic number, because the mean of its divisors is an integer number (6907680).

Almost surely, 2^251995125 is an apocalyptic number.

251995125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251995125 is a deficient number, since it is larger than the sum of its proper divisors (190096395).

251995125 is a wasteful number, since it uses less digits than its factorization.

251995125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511 (or 501 counting only the distinct ones).

The product of its digits is 40500, while the sum is 39.

The square root of 251995125 is about 15874.3543175778. The cubic root of 251995125 is about 631.6318866900.

The spelling of 251995125 in words is "two hundred fifty-one million, nine hundred ninety-five thousand, one hundred twenty-five".