202323220131 has 4 divisors (see below), whose sum is σ = 269764293512. Its totient is φ = 134882146752.

The previous prime is 202323220123. The next prime is 202323220133. The reversal of 202323220131 is 131022323202.

It is a happy number.

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

It is not a de Polignac number, because 202323220131 - 2³ = 202323220123 is a prime.

It is a super-2 number, since 2×202323220131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202323220098 and 202323220107.

It is not an unprimeable number, because it can be changed into a prime (202323220133) 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, 33720536686 + ... + 33720536691.

It is an arithmetic number, because the mean of its divisors is an integer number (67441073378).

Almost surely, 2^202323220131 is an apocalyptic number.

202323220131 is a deficient number, since it is larger than the sum of its proper divisors (67441073381).

202323220131 is an equidigital number, since it uses as much as digits as its factorization.

202323220131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67441073380.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 202323220131 its reverse (131022323202), we get a palindrome (333345543333).

The spelling of 202323220131 in words is "two hundred two billion, three hundred twenty-three million, two hundred twenty thousand, one hundred thirty-one".