25221950 has 24 divisors (see below), whose sum is σ = 50522808. Its totient is φ = 9312480.

The previous prime is 25221947. The next prime is 25221953. The reversal of 25221950 is 5912252.

It is an interprime number because it is at equal distance from previous prime (25221947) and next prime (25221953).

It is a super-2 number, since 2×25221950² = 1272293523605000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25221953) 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 11 ways as a sum of consecutive naturals, for example, 18752 + ... + 20051.

It is an arithmetic number, because the mean of its divisors is an integer number (2105117).

Almost surely, 2^25221950 is an apocalyptic number.

25221950 is an abundant number, since it is smaller than the sum of its proper divisors (25300858).

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

25221950 is a wasteful number, since it uses less digits than its factorization.

25221950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38828 (or 38823 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 25221950 is about 5022.1459556648. The cubic root of 25221950 is about 293.2645399397.

The spelling of 25221950 in words is "twenty-five million, two hundred twenty-one thousand, nine hundred fifty".