21950875 has 16 divisors (see below), whose sum is σ = 27814176. Its totient is φ = 17292000.

The previous prime is 21950849. The next prime is 21950897. The reversal of 21950875 is 57805912.

It is not a de Polignac number, because 21950875 - 2⁵ = 21950843 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7065 + ... + 9685.

It is an arithmetic number, because the mean of its divisors is an integer number (1738386).

Almost surely, 2^21950875 is an apocalyptic number.

21950875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21950875 is a deficient number, since it is larger than the sum of its proper divisors (5863301).

21950875 is an equidigital number, since it uses as much as digits as its factorization.

21950875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2703 (or 2693 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 21950875 is about 4685.1760906075. The cubic root of 21950875 is about 279.9952167550.

The spelling of 21950875 in words is "twenty-one million, nine hundred fifty thousand, eight hundred seventy-five".