25021983 has 32 divisors (see below), whose sum is σ = 39836160. Its totient is φ = 13668480.

The previous prime is 25021979. The next prime is 25021987. The reversal of 25021983 is 38912052.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25021979) and next prime (25021987).

It is not a de Polignac number, because 25021983 - 2² = 25021979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25021983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25021987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110116 + ... + 110342.

It is an arithmetic number, because the mean of its divisors is an integer number (1244880).

Almost surely, 2^25021983 is an apocalyptic number.

25021983 is a deficient number, since it is larger than the sum of its proper divisors (14814177).

25021983 is a wasteful number, since it uses less digits than its factorization.

25021983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 25021983 is about 5002.1978169601. The cubic root of 25021983 is about 292.4874536221.

The spelling of 25021983 in words is "twenty-five million, twenty-one thousand, nine hundred eighty-three".