213220233 has 24 divisors (see below), whose sum is σ = 317693376. Its totient is φ = 137700000.

The previous prime is 213220229. The next prime is 213220243. The reversal of 213220233 is 332022312.

It is a happy number.

213220233 is a `hidden beast` number, since 213 + 220 + 233 = 666.

It is not a de Polignac number, because 213220233 - 2² = 213220229 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213220243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82308 + ... + 84858.

It is an arithmetic number, because the mean of its divisors is an integer number (13237224).

Almost surely, 2^213220233 is an apocalyptic number.

It is an amenable number.

213220233 is a deficient number, since it is larger than the sum of its proper divisors (104473143).

213220233 is a wasteful number, since it uses less digits than its factorization.

213220233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2845 (or 2842 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 213220233 is about 14602.0626282728. The cubic root of 213220233 is about 597.4150207979.

Adding to 213220233 its reverse (332022312), we get a palindrome (545242545).

The spelling of 213220233 in words is "two hundred thirteen million, two hundred twenty thousand, two hundred thirty-three".