25523031 has 16 divisors (see below), whose sum is σ = 35852544. Its totient is φ = 16118784.

The previous prime is 25523011. The next prime is 25523087. The reversal of 25523031 is 13032552.

It is not a de Polignac number, because 25523031 - 2¹⁵ = 25490263 is a prime.

It is a super-2 number, since 2×25523031² = 1302850222853922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25522989 and 25523007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25523011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5655 + ... + 9111.

It is an arithmetic number, because the mean of its divisors is an integer number (2240784).

Almost surely, 2^25523031 is an apocalyptic number.

25523031 is a deficient number, since it is larger than the sum of its proper divisors (10329513).

25523031 is a wasteful number, since it uses less digits than its factorization.

25523031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3590.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 25523031 is about 5052.0323633168. The cubic root of 25523031 is about 294.4268523118.

Adding to 25523031 its reverse (13032552), we get a palindrome (38555583).

The spelling of 25523031 in words is "twenty-five million, five hundred twenty-three thousand, thirty-one".