25632551 has 8 divisors (see below), whose sum is σ = 29343264. Its totient is φ = 21934080.

The previous prime is 25632533. The next prime is 25632553. The reversal of 25632551 is 15523652.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25632551 - 2¹⁰ = 25631527 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 (25632553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1991 + ... + 7431.

It is an arithmetic number, because the mean of its divisors is an integer number (3667908).

Almost surely, 2^25632551 is an apocalyptic number.

25632551 is a deficient number, since it is larger than the sum of its proper divisors (3710713).

25632551 is an equidigital number, since it uses as much as digits as its factorization.

25632551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6121.

The product of its digits is 9000, while the sum is 29.

The square root of 25632551 is about 5062.8599625113. The cubic root of 25632551 is about 294.8473825148.

The spelling of 25632551 in words is "twenty-five million, six hundred thirty-two thousand, five hundred fifty-one".