25223515 has 8 divisors (see below), whose sum is σ = 30651840. Its totient is φ = 19923072.

The previous prime is 25223509. The next prime is 25223551. The reversal of 25223515 is 51532252.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25223515 - 2⁵ = 25223483 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25223515.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31534 + ... + 32323.

It is an arithmetic number, because the mean of its divisors is an integer number (3831480).

Almost surely, 2^25223515 is an apocalyptic number.

25223515 is a deficient number, since it is larger than the sum of its proper divisors (5428325).

25223515 is an equidigital number, since it uses as much as digits as its factorization.

25223515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63941.

The product of its digits is 3000, while the sum is 25.

The square root of 25223515 is about 5022.3017631361. The cubic root of 25223515 is about 293.2706054172.

Adding to 25223515 its reverse (51532252), we get a palindrome (76755767).

The spelling of 25223515 in words is "twenty-five million, two hundred twenty-three thousand, five hundred fifteen".