21875675 has 6 divisors (see below), whose sum is σ = 27125868. Its totient is φ = 17500520.

The previous prime is 21875647. The next prime is 21875699. The reversal of 21875675 is 57657812.

It is not a de Polignac number, because 21875675 - 2⁶ = 21875611 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 437489 + ... + 437538.

It is an arithmetic number, because the mean of its divisors is an integer number (4520978).

Almost surely, 2^21875675 is an apocalyptic number.

21875675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21875675 is a deficient number, since it is larger than the sum of its proper divisors (5250193).

21875675 is an equidigital number, since it uses as much as digits as its factorization.

21875675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875037 (or 875032 counting only the distinct ones).

The product of its digits is 117600, while the sum is 41.

The square root of 21875675 is about 4677.1438934461. The cubic root of 21875675 is about 279.6751121195.

The spelling of 21875675 in words is "twenty-one million, eight hundred seventy-five thousand, six hundred seventy-five".