25825831 has 4 divisors (see below), whose sum is σ = 26029312. Its totient is φ = 25622352.

The previous prime is 25825829. The next prime is 25825847. The reversal of 25825831 is 13852852.

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

It is a cyclic number.

It is not a de Polignac number, because 25825831 - 2¹ = 25825829 is a prime.

It is a super-2 number, since 2×25825831² = 1333947093681122, 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 (25825861) 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, 101550 + ... + 101803.

It is an arithmetic number, because the mean of its divisors is an integer number (6507328).

Almost surely, 2^25825831 is an apocalyptic number.

25825831 is a deficient number, since it is larger than the sum of its proper divisors (203481).

25825831 is a wasteful number, since it uses less digits than its factorization.

25825831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203480.

The product of its digits is 19200, while the sum is 34.

The square root of 25825831 is about 5081.9121401299. The cubic root of 25825831 is about 295.5866178359.

The spelling of 25825831 in words is "twenty-five million, eight hundred twenty-five thousand, eight hundred thirty-one".