25198216 has 32 divisors (see below), whose sum is σ = 51759000. Its totient is φ = 11447296.

The previous prime is 25198211. The next prime is 25198223. The reversal of 25198216 is 61289152.

It can be written as a sum of positive squares in 4 ways, for example, as 17189316 + 8008900 = 4146^2 + 2830^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (25198211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 750 + ... + 7138.

Almost surely, 2^25198216 is an apocalyptic number.

It is an amenable number.

25198216 is an abundant number, since it is smaller than the sum of its proper divisors (26560784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25198216 is a wasteful number, since it uses less digits than its factorization.

25198216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6441 (or 6437 counting only the distinct ones).

The product of its digits is 8640, while the sum is 34.

The square root of 25198216 is about 5019.7824654062. The cubic root of 25198216 is about 293.1725231980.

The spelling of 25198216 in words is "twenty-five million, one hundred ninety-eight thousand, two hundred sixteen".