25623831 has 4 divisors (see below), whose sum is σ = 34165112. Its totient is φ = 17082552.

The previous prime is 25623821. The next prime is 25623833. The reversal of 25623831 is 13832652.

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

It is not a de Polignac number, because 25623831 - 2¹⁷ = 25492759 is a prime.

It is a super-2 number, since 2×25623831² = 1313161430233122, 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 (25623833) 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, 4270636 + ... + 4270641.

It is an arithmetic number, because the mean of its divisors is an integer number (8541278).

Almost surely, 2^25623831 is an apocalyptic number.

25623831 is a deficient number, since it is larger than the sum of its proper divisors (8541281).

25623831 is an equidigital number, since it uses as much as digits as its factorization.

25623831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8541280.

The product of its digits is 8640, while the sum is 30.

The square root of 25623831 is about 5061.9987159224. The cubic root of 25623831 is about 294.8139437727.

The spelling of 25623831 in words is "twenty-five million, six hundred twenty-three thousand, eight hundred thirty-one".