213232211031 has 32 divisors (see below), whose sum is σ = 356897341440. Its totient is φ = 110415105504.

The previous prime is 213232210979. The next prime is 213232211039. The reversal of 213232211031 is 130112232312.

It is not a de Polignac number, because 213232211031 - 2¹³ = 213232202839 is a prime.

It is a super-2 number, since 2×213232211031² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 213232210989 and 213232211007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213232211039) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11608575 + ... + 11626928.

It is an arithmetic number, because the mean of its divisors is an integer number (11153041920).

Almost surely, 2^213232211031 is an apocalyptic number.

213232211031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

213232211031 is a deficient number, since it is larger than the sum of its proper divisors (143665130409).

213232211031 is a wasteful number, since it uses less digits than its factorization.

213232211031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23235555.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 213232211031 its reverse (130112232312), we get a palindrome (343344443343).

The spelling of 213232211031 in words is "two hundred thirteen billion, two hundred thirty-two million, two hundred eleven thousand, thirty-one".