202131309 has 8 divisors (see below), whose sum is σ = 285361920. Its totient is φ = 126827456.

The previous prime is 202131263. The next prime is 202131313. The reversal of 202131309 is 903131202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 202131309 - 2²⁰ = 201082733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202131389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1981629 + ... + 1981730.

It is an arithmetic number, because the mean of its divisors is an integer number (35670240).

Almost surely, 2^202131309 is an apocalyptic number.

It is an amenable number.

202131309 is a deficient number, since it is larger than the sum of its proper divisors (83230611).

202131309 is a wasteful number, since it uses less digits than its factorization.

202131309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3963379.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 202131309 is about 14217.2890875863. The cubic root of 202131309 is about 586.8735404133.

The spelling of 202131309 in words is "two hundred two million, one hundred thirty-one thousand, three hundred nine".