21952875 has 32 divisors (see below), whose sum is σ = 41753088. Its totient is φ = 10034400.

The previous prime is 21952871. The next prime is 21952883. The reversal of 21952875 is 57825912.

It is not a de Polignac number, because 21952875 - 2² = 21952871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21952871) 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, 1557 + ... + 6806.

It is an arithmetic number, because the mean of its divisors is an integer number (1304784).

Almost surely, 2^21952875 is an apocalyptic number.

21952875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21952875 is a deficient number, since it is larger than the sum of its proper divisors (19800213).

21952875 is an equidigital number, since it uses as much as digits as its factorization.

21952875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8388 (or 8378 counting only the distinct ones).

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

The square root of 21952875 is about 4685.3895248954. The cubic root of 21952875 is about 280.0037201887.

The spelling of 21952875 in words is "twenty-one million, nine hundred fifty-two thousand, eight hundred seventy-five".