213233111031 has 16 divisors (see below), whose sum is σ = 289008788960. Its totient is φ = 139807019520.

The previous prime is 213233110967. The next prime is 213233111051. The reversal of 213233111031 is 130111332312.

It is a happy number.

It is not a de Polignac number, because 213233111031 - 2⁶ = 213233110967 is a prime.

It is a super-2 number, since 2×213233111031² (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 = 213233110989 and 213233111007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213233111051) 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, 1435875 + ... + 1577403.

It is an arithmetic number, because the mean of its divisors is an integer number (18063049310).

Almost surely, 2^213233111031 is an apocalyptic number.

213233111031 is a deficient number, since it is larger than the sum of its proper divisors (75775677929).

213233111031 is a wasteful number, since it uses less digits than its factorization.

213233111031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149826.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 213233111031 its reverse (130111332312), we get a palindrome (343344443343).

The spelling of 213233111031 in words is "two hundred thirteen billion, two hundred thirty-three million, one hundred eleven thousand, thirty-one".