25168220 has 96 divisors (see below), whose sum is σ = 67253760. Its totient is φ = 7683840.

The previous prime is 25168193. The next prime is 25168223. The reversal of 25168220 is 2286152.

It is a self number, because there is not a number n which added to its sum of digits gives 25168220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25168223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90722 + ... + 90998.

It is an arithmetic number, because the mean of its divisors is an integer number (700560).

Almost surely, 2^25168220 is an apocalyptic number.

25168220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25168220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33626880).

25168220 is an abundant number, since it is smaller than the sum of its proper divisors (42085540).

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

25168220 is a wasteful number, since it uses less digits than its factorization.

25168220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 25168220 is about 5016.7937968388. The cubic root of 25168220 is about 293.0561459807.

The spelling of 25168220 in words is "twenty-five million, one hundred sixty-eight thousand, two hundred twenty".