21925875 has 32 divisors (see below), whose sum is σ = 37140480. Its totient is φ = 11484000.

The previous prime is 21925853. The next prime is 21925879. The reversal of 21925875 is 57852912.

It is not a de Polignac number, because 21925875 - 2⁷ = 21925747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21925879) 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, 21630 + ... + 22620.

It is an arithmetic number, because the mean of its divisors is an integer number (1160640).

Almost surely, 2^21925875 is an apocalyptic number.

21925875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21925875 is a deficient number, since it is larger than the sum of its proper divisors (15214605).

21925875 is an equidigital number, since it uses as much as digits as its factorization.

21925875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068 (or 1058 counting only the distinct ones).

The product of its digits is 50400, while the sum is 39.

The square root of 21925875 is about 4682.5073411582. The cubic root of 21925875 is about 279.8888802270. Note that the first 5 decimals are identical.

The spelling of 21925875 in words is "twenty-one million, nine hundred twenty-five thousand, eight hundred seventy-five".