25340931 has 80 divisors (see below), whose sum is σ = 50181120. Its totient is φ = 12337920.

The previous prime is 25340923. The next prime is 25340933. The reversal of 25340931 is 13904352.

25340931 is a `hidden beast` number, since 253 + 409 + 3 + 1 = 666.

It is not a de Polignac number, because 25340931 - 2³ = 25340923 is a prime.

It is a super-2 number, since 2×25340931² = 1284325567893522, which contains 22 as substring.

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 = 25340895 and 25340904.

It is not an unprimeable number, because it can be changed into a prime (25340933) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 105910 + ... + 106148.

It is an arithmetic number, because the mean of its divisors is an integer number (627264).

Almost surely, 2^25340931 is an apocalyptic number.

25340931 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25340931 is a deficient number, since it is larger than the sum of its proper divisors (24840189).

25340931 is a wasteful number, since it uses less digits than its factorization.

25340931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286 (or 277 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 25340931 is about 5033.9776519170. The cubic root of 25340931 is about 293.7249614391.

The spelling of 25340931 in words is "twenty-five million, three hundred forty thousand, nine hundred thirty-one".