251330125 has 16 divisors (see below), whose sum is σ = 332113392. Its totient is φ = 189235200.

The previous prime is 251330111. The next prime is 251330137. The reversal of 251330125 is 521033152.

It can be written as a sum of positive squares in 8 ways, for example, as 63393444 + 187936681 = 7962^2 + 13709^2 .

It is not a de Polignac number, because 251330125 - 2⁷ = 251329997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 251330096 and 251330105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57012 + ... + 61261.

It is an arithmetic number, because the mean of its divisors is an integer number (20757087).

Almost surely, 2^251330125 is an apocalyptic number.

251330125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251330125 is a deficient number, since it is larger than the sum of its proper divisors (80783267).

251330125 is a wasteful number, since it uses less digits than its factorization.

251330125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118305 (or 118295 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 251330125 is about 15853.3947468673. The cubic root of 251330125 is about 631.0757843582.

Adding to 251330125 its reverse (521033152), we get a palindrome (772363277).

The spelling of 251330125 in words is "two hundred fifty-one million, three hundred thirty thousand, one hundred twenty-five".