213422881 has 9 divisors (see below), whose sum is σ = 248386449. Its totient is φ = 182846244.

The previous prime is 213422863. The next prime is 213422897. The reversal of 213422881 is 188224312.

It is a happy number.

The square root of 213422881 is 14609.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 213422881 - 2²³ = 205034273 is a prime.

It is a super-2 number, since 2×213422881² = 91098652268680322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213422821) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 101220 + ... + 103306.

Almost surely, 2^213422881 is an apocalyptic number.

213422881 is the 14609-th square number.

213422881 is the 7305-th centered octagonal number.

It is an amenable number.

213422881 is a deficient number, since it is larger than the sum of its proper divisors (34963568).

213422881 is an frugal number, since it uses more digits than its factorization.

213422881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4188 (or 2094 counting only the distinct ones).

The product of its digits is 6144, while the sum is 31.

The cubic root of 213422881 is about 597.6042252081.

The spelling of 213422881 in words is "two hundred thirteen million, four hundred twenty-two thousand, eight hundred eighty-one".