25631427 has 16 divisors (see below), whose sum is σ = 36439200. Its totient is φ = 15969792.

The previous prime is 25631387. The next prime is 25631443. The reversal of 25631427 is 72413652.

It is a de Polignac number, because none of the positive numbers 2^k-25631427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25631394 and 25631403.

It is not an unprimeable number, because it can be changed into a prime (25631227) 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, 5913 + ... + 9285.

It is an arithmetic number, because the mean of its divisors is an integer number (2277450).

Almost surely, 2^25631427 is an apocalyptic number.

25631427 is a deficient number, since it is larger than the sum of its proper divisors (10807773).

25631427 is a wasteful number, since it uses less digits than its factorization.

25631427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3542.

The product of its digits is 10080, while the sum is 30.

The square root of 25631427 is about 5062.7489568415. The cubic root of 25631427 is about 294.8430727174.

The spelling of 25631427 in words is "twenty-five million, six hundred thirty-one thousand, four hundred twenty-seven".