213580921 has 8 divisors (see below), whose sum is σ = 224366400. Its totient is φ = 202920432.

The previous prime is 213580891. The next prime is 213580933. The reversal of 213580921 is 129085312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213580921 - 2²⁵ = 180026489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213580721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27735 + ... + 34588.

It is an arithmetic number, because the mean of its divisors is an integer number (28045800).

Almost surely, 2^213580921 is an apocalyptic number.

It is an amenable number.

213580921 is a deficient number, since it is larger than the sum of its proper divisors (10785479).

213580921 is a wasteful number, since it uses less digits than its factorization.

213580921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62495.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 213580921 is about 14614.4079934837. The cubic root of 213580921 is about 597.7516977887.

The spelling of 213580921 in words is "two hundred thirteen million, five hundred eighty thousand, nine hundred twenty-one".