251153225 has 12 divisors (see below), whose sum is σ = 319848204. Its totient is φ = 195491520.

The previous prime is 251153197. The next prime is 251153237. The reversal of 251153225 is 522351152.

It can be written as a sum of positive squares in 6 ways, for example, as 13623481 + 237529744 = 3691^2 + 15412^2 .

It is not a de Polignac number, because 251153225 - 2¹⁰ = 251152201 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 251153194 and 251153203.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134834 + ... + 136683.

It is an arithmetic number, because the mean of its divisors is an integer number (26654017).

Almost surely, 2^251153225 is an apocalyptic number.

251153225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251153225 is a deficient number, since it is larger than the sum of its proper divisors (68694979).

251153225 is a wasteful number, since it uses less digits than its factorization.

251153225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271564 (or 271559 counting only the distinct ones).

The product of its digits is 3000, while the sum is 26.

The square root of 251153225 is about 15847.8145180968. The cubic root of 251153225 is about 630.9276876286.

The spelling of 251153225 in words is "two hundred fifty-one million, one hundred fifty-three thousand, two hundred twenty-five".