202131023 has 4 divisors (see below), whose sum is σ = 203178528. Its totient is φ = 201083520.

The previous prime is 202131019. The next prime is 202131049. The reversal of 202131023 is 320131202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320131202 = 2 ⋅160065601.

It is a cyclic number.

It is not a de Polignac number, because 202131023 - 2² = 202131019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202130989 and 202131007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202130023) 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, 523463 + ... + 523848.

It is an arithmetic number, because the mean of its divisors is an integer number (50794632).

Almost surely, 2^202131023 is an apocalyptic number.

202131023 is a deficient number, since it is larger than the sum of its proper divisors (1047505).

202131023 is a wasteful number, since it uses less digits than its factorization.

202131023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047504.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 202131023 is about 14217.2790294064. The cubic root of 202131023 is about 586.8732636198.

Adding to 202131023 its reverse (320131202), we get a palindrome (522262225).

The spelling of 202131023 in words is "two hundred two million, one hundred thirty-one thousand, twenty-three".