213223233331 has 4 divisors (see below), whose sum is σ = 214179391552. Its totient is φ = 212267075112.

The previous prime is 213223233299. The next prime is 213223233359. The reversal of 213223233331 is 133332322312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213223233331 - 2⁵ = 213223233299 is a prime.

It is a super-2 number, since 2×213223233331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213223233331.

It is not an unprimeable number, because it can be changed into a prime (213223233031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478078776 + ... + 478079221.

It is an arithmetic number, because the mean of its divisors is an integer number (53544847888).

Almost surely, 2^213223233331 is an apocalyptic number.

213223233331 is a deficient number, since it is larger than the sum of its proper divisors (956158221).

213223233331 is an equidigital number, since it uses as much as digits as its factorization.

213223233331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956158220.

The product of its digits is 11664, while the sum is 28.

Adding to 213223233331 its reverse (133332322312), we get a palindrome (346555555643).

The spelling of 213223233331 in words is "two hundred thirteen billion, two hundred twenty-three million, two hundred thirty-three thousand, three hundred thirty-one".