2551625 has 16 divisors (see below), whose sum is σ = 3229200. Its totient is φ = 2012800.

The previous prime is 2551607. The next prime is 2551639. The reversal of 2551625 is 5261552.

It can be written as a sum of positive squares in 8 ways, for example, as 1261129 + 1290496 = 1123^2 + 1136^2 .

It is not a de Polignac number, because 2551625 - 2⁸ = 2551369 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2551594 and 2551603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17051 + ... + 17199.

It is an arithmetic number, because the mean of its divisors is an integer number (201825).

2^2551625 is an apocalyptic number.

2551625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2551625 is a deficient number, since it is larger than the sum of its proper divisors (677575).

2551625 is a wasteful number, since it uses less digits than its factorization.

2551625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301 (or 291 counting only the distinct ones).

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

The square root of 2551625 is about 1597.3806684695. The cubic root of 2551625 is about 136.6487351713.

The spelling of 2551625 in words is "two million, five hundred fifty-one thousand, six hundred twenty-five".