25572551 has 4 divisors (see below), whose sum is σ = 26397504. Its totient is φ = 24747600.

The previous prime is 25572541. The next prime is 25572601. The reversal of 25572551 is 15527552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25572551 - 2¹⁰ = 25571527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25572511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412430 + ... + 412491.

It is an arithmetic number, because the mean of its divisors is an integer number (6599376).

Almost surely, 2^25572551 is an apocalyptic number.

25572551 is a deficient number, since it is larger than the sum of its proper divisors (824953).

25572551 is an equidigital number, since it uses as much as digits as its factorization.

25572551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824952.

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

The square root of 25572551 is about 5056.9309862801. The cubic root of 25572551 is about 294.6171457825.

The spelling of 25572551 in words is "twenty-five million, five hundred seventy-two thousand, five hundred fifty-one".