213421132 has 24 divisors (see below), whose sum is σ = 377546400. Its totient is φ = 105557760.

The previous prime is 213421123. The next prime is 213421141. The reversal of 213421132 is 231124312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (213421123) and next prime (213421141).

It is a super-2 number, since 2×213421132² = 91097159168322848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156132 + ... + 157492.

It is an arithmetic number, because the mean of its divisors is an integer number (15731100).

Almost surely, 2^213421132 is an apocalyptic number.

It is an amenable number.

213421132 is a deficient number, since it is larger than the sum of its proper divisors (164125268).

213421132 is a wasteful number, since it uses less digits than its factorization.

213421132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761 (or 1759 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 213421132 is about 14608.9401395173. The cubic root of 213421132 is about 597.6025927486.

Adding to 213421132 its reverse (231124312), we get a palindrome (444545444).

The spelling of 213421132 in words is "two hundred thirteen million, four hundred twenty-one thousand, one hundred thirty-two".