25002220 has 48 divisors (see below), whose sum is σ = 54250560. Its totient is φ = 9674496.

The previous prime is 25002209. The next prime is 25002227. The reversal of 25002220 is 2220052.

It is a super-2 number, since 2×25002220² = 1250222009856800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25002220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25002227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109066 + ... + 109294.

It is an arithmetic number, because the mean of its divisors is an integer number (1130220).

Almost surely, 2^25002220 is an apocalyptic number.

25002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25002220 is an abundant number, since it is smaller than the sum of its proper divisors (29248340).

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

25002220 is a wasteful number, since it uses less digits than its factorization.

25002220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 25002220 is about 5000.2219950718. The cubic root of 25002220 is about 292.4104286576.

Adding to 25002220 its reverse (2220052), we get a palindrome (27222272).

The spelling of 25002220 in words is "twenty-five million, two thousand, two hundred twenty".