25520115 has 16 divisors (see below), whose sum is σ = 40958208. Its totient is φ = 13568736.

The previous prime is 25520071. The next prime is 25520123. The reversal of 25520115 is 51102552.

It is not a de Polignac number, because 25520115 - 2⁶ = 25520051 is a prime.

It is a super-2 number, since 2×25520115² = 1302552539226450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25520091 and 25520100.

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, 2754 + ... + 7656.

It is an arithmetic number, because the mean of its divisors is an integer number (2559888).

Almost surely, 2^25520115 is an apocalyptic number.

25520115 is a deficient number, since it is larger than the sum of its proper divisors (15438093).

25520115 is a wasteful number, since it uses less digits than its factorization.

25520115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5258.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 25520115 is about 5051.7437583472. The cubic root of 25520115 is about 294.4156391530.

Adding to 25520115 its reverse (51102552), we get a palindrome (76622667).

The spelling of 25520115 in words is "twenty-five million, five hundred twenty thousand, one hundred fifteen".