21195214 has 16 divisors (see below), whose sum is σ = 32606208. Its totient is φ = 10328472.

The previous prime is 21195199. The next prime is 21195221. The reversal of 21195214 is 41259112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43279 + ... + 43765.

It is an arithmetic number, because the mean of its divisors is an integer number (2037888).

Almost surely, 2^21195214 is an apocalyptic number.

21195214 is a deficient number, since it is larger than the sum of its proper divisors (11410994).

21195214 is a wasteful number, since it uses less digits than its factorization.

21195214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999.

The product of its digits is 720, while the sum is 25.

The square root of 21195214 is about 4603.8260175641. The cubic root of 21195214 is about 276.7446721223.

The spelling of 21195214 in words is "twenty-one million, one hundred ninety-five thousand, two hundred fourteen".