25232220 has 144 divisors (see below), whose sum is σ = 84756672. Its totient is φ = 6036480.

The previous prime is 25232213. The next prime is 25232239. The reversal of 25232220 is 2223252.

It is a super-2 number, since 2×25232220² = 1273329852256800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 25232193 and 25232202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 95809 + ... + 96071.

It is an arithmetic number, because the mean of its divisors is an integer number (588588).

Almost surely, 2^25232220 is an apocalyptic number.

25232220 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 25232220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42378336).

25232220 is an abundant number, since it is smaller than the sum of its proper divisors (59524452).

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

25232220 is a wasteful number, since it uses less digits than its factorization.

25232220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 25232220 is about 5023.1683228815. The cubic root of 25232220 is about 293.3043388467.

Adding to 25232220 its reverse (2223252), we get a palindrome (27455472).

It can be divided in two parts, 25232 and 220, that added together give a palindrome (25452).

The spelling of 25232220 in words is "twenty-five million, two hundred thirty-two thousand, two hundred twenty".