25551572 has 6 divisors (see below), whose sum is σ = 44715258. Its totient is φ = 12775784.

The previous prime is 25551557. The next prime is 25551577. The reversal of 25551572 is 27515552.

It can be written as a sum of positive squares in only one way, i.e., 14167696 + 11383876 = 3764^2 + 3374^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25551577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3193943 + ... + 3193950.

It is an arithmetic number, because the mean of its divisors is an integer number (7452543).

Almost surely, 2^25551572 is an apocalyptic number.

It is an amenable number.

25551572 is a deficient number, since it is larger than the sum of its proper divisors (19163686).

25551572 is a wasteful number, since it uses less digits than its factorization.

25551572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6387897 (or 6387895 counting only the distinct ones).

The product of its digits is 17500, while the sum is 32.

The square root of 25551572 is about 5054.8562788669. The cubic root of 25551572 is about 294.5365585407.

The spelling of 25551572 in words is "twenty-five million, five hundred fifty-one thousand, five hundred seventy-two".