202423131131 has 4 divisors (see below), whose sum is σ = 217994141232. Its totient is φ = 186852121032.

The previous prime is 202423131109. The next prime is 202423131143. The reversal of 202423131131 is 131131324202.

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 202423131131 - 2²² = 202418936827 is a prime.

It is a super-2 number, since 2×202423131131² (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 = 202423131097 and 202423131106.

It is not an unprimeable number, because it can be changed into a prime (202423134131) 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, 7785505031 + ... + 7785505056.

It is an arithmetic number, because the mean of its divisors is an integer number (54498535308).

Almost surely, 2^202423131131 is an apocalyptic number.

202423131131 is a deficient number, since it is larger than the sum of its proper divisors (15571010101).

202423131131 is a wasteful number, since it uses less digits than its factorization.

202423131131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15571010100.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 202423131131 its reverse (131131324202), we get a palindrome (333554455333).

The spelling of 202423131131 in words is "two hundred two billion, four hundred twenty-three million, one hundred thirty-one thousand, one hundred thirty-one".