25131553 has 4 divisors (see below), whose sum is σ = 25414020. Its totient is φ = 24849088.

The previous prime is 25131541. The next prime is 25131569. The reversal of 25131553 is 35513152.

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 5841889 + 19289664 = 2417^2 + 4392^2 .

It is a cyclic number.

It is not a de Polignac number, because 25131553 - 2⁵ = 25131521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25131523) 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, 141100 + ... + 141277.

It is an arithmetic number, because the mean of its divisors is an integer number (6353505).

Almost surely, 2^25131553 is an apocalyptic number.

It is an amenable number.

25131553 is a deficient number, since it is larger than the sum of its proper divisors (282467).

25131553 is an equidigital number, since it uses as much as digits as its factorization.

25131553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282466.

The product of its digits is 2250, while the sum is 25.

The square root of 25131553 is about 5013.1380391926. The cubic root of 25131553 is about 292.9137612296.

The spelling of 25131553 in words is "twenty-five million, one hundred thirty-one thousand, five hundred fifty-three".