212213131 has 12 divisors (see below), whose sum is σ = 234690912. Its totient is φ = 191714016.

The previous prime is 212213129. The next prime is 212213143. The reversal of 212213131 is 131312212.

212213131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212213131 - 2¹ = 212213129 is a prime.

It is a super-2 number, since 2×212213131² = 90068825937646322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212213231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5416 + ... + 21301.

It is an arithmetic number, because the mean of its divisors is an integer number (19557576).

Almost surely, 2^212213131 is an apocalyptic number.

212213131 is a deficient number, since it is larger than the sum of its proper divisors (22477781).

212213131 is a wasteful number, since it uses less digits than its factorization.

212213131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26790 (or 26777 counting only the distinct ones).

The product of its digits is 72, while the sum is 16.

The square root of 212213131 is about 14567.5368885752. The cubic root of 212213131 is about 596.4729469361.

Adding to 212213131 its reverse (131312212), we get a palindrome (343525343).

The spelling of 212213131 in words is "two hundred twelve million, two hundred thirteen thousand, one hundred thirty-one".