25553131 has 4 divisors (see below), whose sum is σ = 25564032. Its totient is φ = 25542232.

The previous prime is 25553123. The next prime is 25553153. The reversal of 25553131 is 13135552.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25553131 - 2³ = 25553123 is a prime.

It is a super-2 number, since 2×25553131² = 1305925007806322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25553096 and 25553105.

It is not an unprimeable number, because it can be changed into a prime (25503131) 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, 331 + ... + 7156.

It is an arithmetic number, because the mean of its divisors is an integer number (6391008).

Almost surely, 2^25553131 is an apocalyptic number.

25553131 is a deficient number, since it is larger than the sum of its proper divisors (10901).

25553131 is an equidigital number, since it uses as much as digits as its factorization.

25553131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10900.

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

The square root of 25553131 is about 5055.0104846578. The cubic root of 25553131 is about 294.5425486895.

Adding to 25553131 its reverse (13135552), we get a palindrome (38688683).

The spelling of 25553131 in words is "twenty-five million, five hundred fifty-three thousand, one hundred thirty-one".