25315939 has 16 divisors (see below), whose sum is σ = 29445120. Its totient is φ = 21535360.

The previous prime is 25315921. The next prime is 25315943. The reversal of 25315939 is 93951352.

It is not a de Polignac number, because 25315939 - 2¹⁷ = 25184867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25315898 and 25315907.

It is not an unprimeable number, because it can be changed into a prime (25315909) 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, 10827 + ... + 12955.

It is an arithmetic number, because the mean of its divisors is an integer number (1840320).

Almost surely, 2^25315939 is an apocalyptic number.

25315939 is a deficient number, since it is larger than the sum of its proper divisors (4129181).

25315939 is a wasteful number, since it uses less digits than its factorization.

25315939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2210.

The product of its digits is 36450, while the sum is 37.

The square root of 25315939 is about 5031.4947083347. The cubic root of 25315939 is about 293.6283695026.

The spelling of 25315939 in words is "twenty-five million, three hundred fifteen thousand, nine hundred thirty-nine".