25250015 has 16 divisors (see below), whose sum is σ = 36666432. Its totient is φ = 16295424.

The previous prime is 25250003. The next prime is 25250033. The reversal of 25250015 is 51005252.

It is a cyclic number.

It is not a de Polignac number, because 25250015 - 2⁴ = 25249999 is a prime.

It is a Duffinian number.

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, 20624 + ... + 21813.

It is an arithmetic number, because the mean of its divisors is an integer number (2291652).

Almost surely, 2^25250015 is an apocalyptic number.

25250015 is a deficient number, since it is larger than the sum of its proper divisors (11416417).

25250015 is a wasteful number, since it uses less digits than its factorization.

25250015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42466.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 25250015 is about 5024.9393031160. The cubic root of 25250015 is about 293.3732735158.

Adding to 25250015 its reverse (51005252), we get a palindrome (76255267).

The spelling of 25250015 in words is "twenty-five million, two hundred fifty thousand, fifteen".