25223100 has 72 divisors (see below), whose sum is σ = 83411328. Its totient is φ = 5764800.

The previous prime is 25223063. The next prime is 25223101. The reversal of 25223100 is 132252.

It is a super-2 number, since 2×25223100² = 1272409547220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 25223100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25223101) 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, 3906 + ... + 8105.

Almost surely, 2^25223100 is an apocalyptic number.

25223100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25223100 is an abundant number, since it is smaller than the sum of its proper divisors (58188228).

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

25223100 is a wasteful number, since it uses less digits than its factorization.

25223100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12035 (or 12028 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 25223100 is about 5022.2604472488. The cubic root of 25223100 is about 293.2689970243.

Adding to 25223100 its reverse (132252), we get a palindrome (25355352).

The spelling of 25223100 in words is "twenty-five million, two hundred twenty-three thousand, one hundred".