25573131 has 16 divisors (see below), whose sum is σ = 37979520. Its totient is φ = 17006760.

The previous prime is 25573129. The next prime is 25573147. The reversal of 25573131 is 13137552.

It is not a de Polignac number, because 25573131 - 2¹ = 25573129 is a prime.

It is a super-3 number, since 3×25573131³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 25573095 and 25573104.

It is not an unprimeable number, because it can be changed into a prime (25573231) 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, 13216 + ... + 15026.

It is an arithmetic number, because the mean of its divisors is an integer number (2373720).

Almost surely, 2^25573131 is an apocalyptic number.

25573131 is a deficient number, since it is larger than the sum of its proper divisors (12406389).

25573131 is a wasteful number, since it uses less digits than its factorization.

25573131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343 (or 2337 counting only the distinct ones).

The product of its digits is 3150, while the sum is 27.

The square root of 25573131 is about 5056.9883329903. The cubic root of 25573131 is about 294.6193731271.

The spelling of 25573131 in words is "twenty-five million, five hundred seventy-three thousand, one hundred thirty-one".