213202131 has 4 divisors (see below), whose sum is σ = 284269512. Its totient is φ = 142134752.

The previous prime is 213202123. The next prime is 213202153. The reversal of 213202131 is 131202312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213202131 - 2³ = 213202123 is a prime.

It is a super-2 number, since 2×213202131² = 90910297325882322, 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 213202131.

It is not an unprimeable number, because it can be changed into a prime (213202181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35533686 + ... + 35533691.

It is an arithmetic number, because the mean of its divisors is an integer number (71067378).

Almost surely, 2^213202131 is an apocalyptic number.

213202131 is a deficient number, since it is larger than the sum of its proper divisors (71067381).

213202131 is an equidigital number, since it uses as much as digits as its factorization.

213202131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71067380.

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

The square root of 213202131 is about 14601.4427711785. The cubic root of 213202131 is about 597.3981138458.

Adding to 213202131 its reverse (131202312), we get a palindrome (344404443).

The spelling of 213202131 in words is "two hundred thirteen million, two hundred two thousand, one hundred thirty-one".