213131022 has 16 divisors (see below), whose sum is σ = 459051600. Its totient is φ = 65578752.

The previous prime is 213131003. The next prime is 213131027. The reversal of 213131022 is 220131312.

213131022 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 213130992 and 213131010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213131027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1366147 + ... + 1366302.

It is an arithmetic number, because the mean of its divisors is an integer number (28690725).

Almost surely, 2^213131022 is an apocalyptic number.

213131022 is an abundant number, since it is smaller than the sum of its proper divisors (245920578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213131022 is a wasteful number, since it uses less digits than its factorization.

213131022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2732467.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 213131022 is about 14599.0075690096. The cubic root of 213131022 is about 597.3316900161.

Adding to 213131022 its reverse (220131312), we get a palindrome (433262334).

It can be divided in two parts, 2131 and 31022, that added together give a triangular number (33153 = T₂₅₇).

The spelling of 213131022 in words is "two hundred thirteen million, one hundred thirty-one thousand, twenty-two".