25321553 has 4 divisors (see below), whose sum is σ = 26194740. Its totient is φ = 24448368.

The previous prime is 25321537. The next prime is 25321567. The reversal of 25321553 is 35512352.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13162384 + 12159169 = 3628^2 + 3487^2 .

It is a cyclic number.

It is not a de Polignac number, because 25321553 - 2⁴ = 25321537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25321253) 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, 436550 + ... + 436607.

It is an arithmetic number, because the mean of its divisors is an integer number (6548685).

Almost surely, 2^25321553 is an apocalyptic number.

It is an amenable number.

25321553 is a deficient number, since it is larger than the sum of its proper divisors (873187).

25321553 is an equidigital number, since it uses as much as digits as its factorization.

25321553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873186.

The product of its digits is 4500, while the sum is 26.

The square root of 25321553 is about 5032.0525633185. The cubic root of 25321553 is about 293.6500726654.

The spelling of 25321553 in words is "twenty-five million, three hundred twenty-one thousand, five hundred fifty-three".