213311433031 has 4 divisors (see below), whose sum is σ = 213312383712. Its totient is φ = 213310482352.

The previous prime is 213311432993. The next prime is 213311433067. The reversal of 213311433031 is 130334113312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 213311433031 - 2⁷ = 213311432903 is a prime.

It is a super-2 number, since 2×213311433031² (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 = 213311432987 and 213311433005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213311433631) 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, 69051 + ... + 656803.

It is an arithmetic number, because the mean of its divisors is an integer number (53328095928).

Almost surely, 2^213311433031 is an apocalyptic number.

213311433031 is a deficient number, since it is larger than the sum of its proper divisors (950681).

213311433031 is an equidigital number, since it uses as much as digits as its factorization.

213311433031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950680.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 213311433031 its reverse (130334113312), we get a palindrome (343645546343).

The spelling of 213311433031 in words is "two hundred thirteen billion, three hundred eleven million, four hundred thirty-three thousand, thirty-one".