213020323031 has 16 divisors (see below), whose sum is σ = 226038695040. Its totient is φ = 200187917280.

The previous prime is 213020323027. The next prime is 213020323051. The reversal of 213020323031 is 130323020312.

It is a cyclic number.

It is not a de Polignac number, because 213020323031 - 2² = 213020323027 is a prime.

It is a super-2 number, since 2×213020323031² (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 = 213020322994 and 213020323012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213020323051) 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, 1382996 + ... + 1529286.

It is an arithmetic number, because the mean of its divisors is an integer number (14127418440).

Almost surely, 2^213020323031 is an apocalyptic number.

213020323031 is a deficient number, since it is larger than the sum of its proper divisors (13018372009).

213020323031 is a wasteful number, since it uses less digits than its factorization.

213020323031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146926.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 213020323031 its reverse (130323020312), we get a palindrome (343343343343).

The spelling of 213020323031 in words is "two hundred thirteen billion, twenty million, three hundred twenty-three thousand, thirty-one".