213233011031 has 4 divisors (see below), whose sum is σ = 215344229064. Its totient is φ = 211121793000.

The previous prime is 213233011001. The next prime is 213233011039. The reversal of 213233011031 is 130110332312.

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 213233011031 - 2⁶ = 213233010967 is a prime.

It is a super-2 number, since 2×213233011031² (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 = 213233010994 and 213233011012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213233011039) 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, 1055608865 + ... + 1055609066.

It is an arithmetic number, because the mean of its divisors is an integer number (53836057266).

Almost surely, 2^213233011031 is an apocalyptic number.

213233011031 is a deficient number, since it is larger than the sum of its proper divisors (2111218033).

213233011031 is a wasteful number, since it uses less digits than its factorization.

213233011031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111218032.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 213233011031 its reverse (130110332312), we get a palindrome (343343343343).

The spelling of 213233011031 in words is "two hundred thirteen billion, two hundred thirty-three million, eleven thousand, thirty-one".