25244220 has 24 divisors (see below), whose sum is σ = 70683984. Its totient is φ = 6731776.

The previous prime is 25244183. The next prime is 25244237. The reversal of 25244220 is 2244252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210309 + ... + 210428.

It is an arithmetic number, because the mean of its divisors is an integer number (2945166).

Almost surely, 2^25244220 is an apocalyptic number.

25244220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25244220 is an abundant number, since it is smaller than the sum of its proper divisors (45439764).

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

25244220 is a wasteful number, since it uses less digits than its factorization.

25244220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420749 (or 420747 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 25244220 is about 5024.3626461473. The cubic root of 25244220 is about 293.3508282724.

Adding to 25244220 its reverse (2244252), we get a palindrome (27488472).

The spelling of 25244220 in words is "twenty-five million, two hundred forty-four thousand, two hundred twenty".