25204220 has 24 divisors (see below), whose sum is σ = 54057024. Its totient is φ = 9866816.

The previous prime is 25204213. The next prime is 25204229. The reversal of 25204220 is 2240252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25204229) 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, 12467 + ... + 14346.

It is an arithmetic number, because the mean of its divisors is an integer number (2252376).

Almost surely, 2^25204220 is an apocalyptic number.

25204220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25204220 is an abundant number, since it is smaller than the sum of its proper divisors (28852804).

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

25204220 is a wasteful number, since it uses less digits than its factorization.

25204220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26869 (or 26867 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 25204220 is about 5020.3804636701. The cubic root of 25204220 is about 293.1958061697.

Adding to 25204220 its reverse (2240252), we get a palindrome (27444472).

The spelling of 25204220 in words is "twenty-five million, two hundred four thousand, two hundred twenty".