25494631 has 4 divisors (see below), whose sum is σ = 25506792. Its totient is φ = 25482472.

The previous prime is 25494629. The next prime is 25494647. The reversal of 25494631 is 13649452.

It is a happy number.

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 25494631 - 2¹ = 25494629 is a prime.

It is a super-2 number, since 2×25494631² = 1299952419652322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25494691) 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, 2041 + ... + 7426.

It is an arithmetic number, because the mean of its divisors is an integer number (6376698).

Almost surely, 2^25494631 is an apocalyptic number.

25494631 is a deficient number, since it is larger than the sum of its proper divisors (12161).

25494631 is an equidigital number, since it uses as much as digits as its factorization.

25494631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12160.

The product of its digits is 25920, while the sum is 34.

The square root of 25494631 is about 5049.2208309798. The cubic root of 25494631 is about 294.3176068498.

The spelling of 25494631 in words is "twenty-five million, four hundred ninety-four thousand, six hundred thirty-one".