251760225 has 48 divisors (see below), whose sum is σ = 442739520. Its totient is φ = 125798400.

The previous prime is 251760221. The next prime is 251760239. The reversal of 251760225 is 522067152.

It is not a de Polignac number, because 251760225 - 2² = 251760221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 251760192 and 251760201.

It is not an unprimeable number, because it can be changed into a prime (251760221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 482965 + ... + 483485.

It is an arithmetic number, because the mean of its divisors is an integer number (9223740).

Almost surely, 2^251760225 is an apocalyptic number.

251760225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251760225 is a deficient number, since it is larger than the sum of its proper divisors (190979295).

251760225 is a wasteful number, since it uses less digits than its factorization.

251760225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930 (or 925 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 251760225 is about 15866.9538664483. The cubic root of 251760225 is about 631.4355648290.

The spelling of 251760225 in words is "two hundred fifty-one million, seven hundred sixty thousand, two hundred twenty-five".