25493215 has 8 divisors (see below), whose sum is σ = 33373008. Its totient is φ = 18540480.

The previous prime is 25493213. The next prime is 25493227. The reversal of 25493215 is 51239452.

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

It is not a de Polignac number, because 25493215 - 2¹ = 25493213 is a prime.

It is a super-2 number, since 2×25493215² = 1299808022072450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25493213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231702 + ... + 231811.

It is an arithmetic number, because the mean of its divisors is an integer number (4171626).

Almost surely, 2^25493215 is an apocalyptic number.

25493215 is a deficient number, since it is larger than the sum of its proper divisors (7879793).

25493215 is a wasteful number, since it uses less digits than its factorization.

25493215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463529.

The product of its digits is 10800, while the sum is 31.

The square root of 25493215 is about 5049.0806093783. The cubic root of 25493215 is about 294.3121578404.

The spelling of 25493215 in words is "twenty-five million, four hundred ninety-three thousand, two hundred fifteen".