25312215 has 16 divisors (see below), whose sum is σ = 41896800. Its totient is φ = 13034112.

The previous prime is 25312207. The next prime is 25312229. The reversal of 25312215 is 51221352.

It is not a de Polignac number, because 25312215 - 2³ = 25312207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25312191 and 25312200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28660 + ... + 29529.

It is an arithmetic number, because the mean of its divisors is an integer number (2618550).

Almost surely, 2^25312215 is an apocalyptic number.

25312215 is a deficient number, since it is larger than the sum of its proper divisors (16584585).

25312215 is a wasteful number, since it uses less digits than its factorization.

25312215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58226.

The product of its digits is 600, while the sum is 21.

The square root of 25312215 is about 5031.1246257671. The cubic root of 25312215 is about 293.6139711208.

Adding to 25312215 its reverse (51221352), we get a palindrome (76533567).

The spelling of 25312215 in words is "twenty-five million, three hundred twelve thousand, two hundred fifteen".