25220115 has 12 divisors (see below), whose sum is σ = 43714944. Its totient is φ = 13450704.

The previous prime is 25220099. The next prime is 25220119. The reversal of 25220115 is 51102252.

It is not a de Polignac number, because 25220115 - 2⁴ = 25220099 is a prime.

It is a super-2 number, since 2×25220115² = 1272108401226450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25220119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 280179 + ... + 280268.

It is an arithmetic number, because the mean of its divisors is an integer number (3642912).

Almost surely, 2^25220115 is an apocalyptic number.

25220115 is a deficient number, since it is larger than the sum of its proper divisors (18494829).

25220115 is a wasteful number, since it uses less digits than its factorization.

25220115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560458 (or 560455 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 25220115 is about 5021.9632615144. The cubic root of 25220115 is about 293.2574277024.

Adding to 25220115 its reverse (51102252), we get a palindrome (76322367).

The spelling of 25220115 in words is "twenty-five million, two hundred twenty thousand, one hundred fifteen".