213031322 has 24 divisors (see below), whose sum is σ = 373145940. Its totient is φ = 90948480.

The previous prime is 213031309. The next prime is 213031333. The reversal of 213031322 is 223130312.

213031322 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 188815081 + 24216241 = 13741^2 + 4921^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 213031322.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22322 + ... + 30402.

Almost surely, 2^213031322 is an apocalyptic number.

213031322 is a deficient number, since it is larger than the sum of its proper divisors (160114618).

213031322 is a wasteful number, since it uses less digits than its factorization.

213031322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8366 (or 8359 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 213031322 is about 14595.5925539185. The cubic root of 213031322 is about 597.2385340823.

Adding to 213031322 its reverse (223130312), we get a palindrome (436161634).

The spelling of 213031322 in words is "two hundred thirteen million, thirty-one thousand, three hundred twenty-two".