251150225 has 24 divisors (see below), whose sum is σ = 326116032. Its totient is φ = 191505600.

The previous prime is 251150219. The next prime is 251150233. The reversal of 251150225 is 522051152.

It is not a de Polignac number, because 251150225 - 2⁴ = 251150209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 251150225.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 213890 + ... + 215060.

It is an arithmetic number, because the mean of its divisors is an integer number (13588168).

Almost surely, 2^251150225 is an apocalyptic number.

251150225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251150225 is a deficient number, since it is larger than the sum of its proper divisors (74965807).

251150225 is a wasteful number, since it uses less digits than its factorization.

251150225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577 (or 1572 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 251150225 is about 15847.7198675393. The cubic root of 251150225 is about 630.9251754961.

The spelling of 251150225 in words is "two hundred fifty-one million, one hundred fifty thousand, two hundred twenty-five".