25228215 has 24 divisors (see below), whose sum is σ = 43952688. Its totient is φ = 13386240.

The previous prime is 25228211. The next prime is 25228241. The reversal of 25228215 is 51282252.

It is not a de Polignac number, because 25228215 - 2² = 25228211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25228211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8167 + ... + 10823.

It is an arithmetic number, because the mean of its divisors is an integer number (1831362).

Almost surely, 2^25228215 is an apocalyptic number.

25228215 is a deficient number, since it is larger than the sum of its proper divisors (18724473).

25228215 is a wasteful number, since it uses less digits than its factorization.

25228215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2879 (or 2876 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 25228215 is about 5022.7696542844. The cubic root of 25228215 is about 293.2888197203.

The spelling of 25228215 in words is "twenty-five million, two hundred twenty-eight thousand, two hundred fifteen".