22725651 has 32 divisors (see below), whose sum is σ = 34933248. Its totient is φ = 13017600.

The previous prime is 22725643. The next prime is 22725671. The reversal of 22725651 is 15652722.

It is not a de Polignac number, because 22725651 - 2³ = 22725643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22725671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100000 + ... + 100226.

It is an arithmetic number, because the mean of its divisors is an integer number (1091664).

Almost surely, 2^22725651 is an apocalyptic number.

22725651 is a deficient number, since it is larger than the sum of its proper divisors (12207597).

22725651 is a wasteful number, since it uses less digits than its factorization.

22725651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411.

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

The square root of 22725651 is about 4767.1428550024. The cubic root of 22725651 is about 283.2514299212.

It can be divided in two parts, 227 and 25651, that added together give a triangular number (25878 = T₂₂₇).

The spelling of 22725651 in words is "twenty-two million, seven hundred twenty-five thousand, six hundred fifty-one".