25033220 has 12 divisors (see below), whose sum is σ = 52569804. Its totient is φ = 10013280.

The previous prime is 25033219. The next prime is 25033237. The reversal of 25033220 is 2233052.

It can be written as a sum of positive squares in 2 ways, for example, as 13075456 + 11957764 = 3616^2 + 3458^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 625811 + ... + 625850.

It is an arithmetic number, because the mean of its divisors is an integer number (4380817).

Almost surely, 2^25033220 is an apocalyptic number.

25033220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25033220 is an abundant number, since it is smaller than the sum of its proper divisors (27536584).

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

25033220 is a wasteful number, since it uses less digits than its factorization.

25033220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251670 (or 1251668 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 25033220 is about 5003.3208971642. The cubic root of 25033220 is about 292.5312309897.

Adding to 25033220 its reverse (2233052), we get a palindrome (27266272).

The spelling of 25033220 in words is "twenty-five million, thirty-three thousand, two hundred twenty".