320212131 has 16 divisors (see below), whose sum is σ = 429831168. Its totient is φ = 212040000.

The previous prime is 320212127. The next prime is 320212157. The reversal of 320212131 is 131212023.

It is not a de Polignac number, because 320212131 - 2² = 320212127 is a prime.

It is a super-2 number, since 2×320212131² = 205071617679122322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 320212131.

It is not an unprimeable number, because it can be changed into a prime (320212181) 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, 426006 + ... + 426756.

It is an arithmetic number, because the mean of its divisors is an integer number (26864448).

Almost surely, 2^320212131 is an apocalyptic number.

320212131 is a deficient number, since it is larger than the sum of its proper divisors (109619037).

320212131 is a wasteful number, since it uses less digits than its factorization.

320212131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522.

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

The square root of 320212131 is about 17894.4720793881. The cubic root of 320212131 is about 684.1414864968.

Adding to 320212131 its reverse (131212023), we get a palindrome (451424154).

The spelling of 320212131 in words is "three hundred twenty million, two hundred twelve thousand, one hundred thirty-one".