25563572 has 6 divisors (see below), whose sum is σ = 44736258. Its totient is φ = 12781784.

The previous prime is 25563553. The next prime is 25563581. The reversal of 25563572 is 27536552.

It can be written as a sum of positive squares in only one way, i.e., 19678096 + 5885476 = 4436^2 + 2426^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3195443 + ... + 3195450.

It is an arithmetic number, because the mean of its divisors is an integer number (7456043).

Almost surely, 2^25563572 is an apocalyptic number.

It is an amenable number.

25563572 is a deficient number, since it is larger than the sum of its proper divisors (19172686).

25563572 is a wasteful number, since it uses less digits than its factorization.

25563572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6390897 (or 6390895 counting only the distinct ones).

The product of its digits is 63000, while the sum is 35.

The square root of 25563572 is about 5056.0431169048. The cubic root of 25563572 is about 294.5826598862.

The spelling of 25563572 in words is "twenty-five million, five hundred sixty-three thousand, five hundred seventy-two".