213311303231 has 16 divisors (see below), whose sum is σ = 234261297984. Its totient is φ = 193042393344.

The previous prime is 213311303221. The next prime is 213311303251. The reversal of 213311303231 is 132303113312.

It is a cyclic number.

It is not a de Polignac number, because 213311303231 - 2¹⁸ = 213311041087 is a prime.

It is a super-2 number, since 2×213311303231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213311303197 and 213311303206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213311303221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 514496 + ... + 831461.

It is an arithmetic number, because the mean of its divisors is an integer number (14641331124).

Almost surely, 2^213311303231 is an apocalyptic number.

213311303231 is a deficient number, since it is larger than the sum of its proper divisors (20949994753).

213311303231 is a wasteful number, since it uses less digits than its factorization.

213311303231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346210.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 213311303231 its reverse (132303113312), we get a palindrome (345614416543).

The spelling of 213311303231 in words is "two hundred thirteen billion, three hundred eleven million, three hundred three thousand, two hundred thirty-one".