213231205 has 32 divisors (see below), whose sum is σ = 296732160. Its totient is φ = 145465920.

The previous prime is 213231197. The next prime is 213231353. The reversal of 213231205 is 502132312.

It is not a de Polignac number, because 213231205 - 2³ = 213231197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110862 + ... + 112768.

It is an arithmetic number, because the mean of its divisors is an integer number (9272880).

Almost surely, 2^213231205 is an apocalyptic number.

It is an amenable number.

213231205 is a deficient number, since it is larger than the sum of its proper divisors (83500955).

213231205 is a wasteful number, since it uses less digits than its factorization.

213231205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2049.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 213231205 is about 14602.4383237869. The cubic root of 213231205 is about 597.4252679886.

Adding to 213231205 its reverse (502132312), we get a palindrome (715363517).

The spelling of 213231205 in words is "two hundred thirteen million, two hundred thirty-one thousand, two hundred five".