25015217 has 4 divisors (see below), whose sum is σ = 25367616. Its totient is φ = 24662820.

The previous prime is 25015213. The next prime is 25015231. The reversal of 25015217 is 71251052.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25015217 - 2² = 25015213 is a prime.

It is a super-2 number, since 2×25015217² = 1251522163114178, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25015192 and 25015201.

It is not an unprimeable number, because it can be changed into a prime (25015213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176093 + ... + 176234.

It is an arithmetic number, because the mean of its divisors is an integer number (6341904).

Almost surely, 2^25015217 is an apocalyptic number.

It is an amenable number.

25015217 is a deficient number, since it is larger than the sum of its proper divisors (352399).

25015217 is an equidigital number, since it uses as much as digits as its factorization.

25015217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352398.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 25015217 is about 5001.5214685134. The cubic root of 25015217 is about 292.4610881590.

Adding to 25015217 its reverse (71251052), we get a palindrome (96266269).

The spelling of 25015217 in words is "twenty-five million, fifteen thousand, two hundred seventeen".