202323431 has 4 divisors (see below), whose sum is σ = 202519200. Its totient is φ = 202127664.

The previous prime is 202323427. The next prime is 202323461. The reversal of 202323431 is 134323202.

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 202323431 - 2² = 202323427 is a prime.

It is a super-2 number, since 2×202323431² = 81869541463223522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202323461) 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, 96326 + ... + 98403.

It is an arithmetic number, because the mean of its divisors is an integer number (50629800).

Almost surely, 2^202323431 is an apocalyptic number.

202323431 is a deficient number, since it is larger than the sum of its proper divisors (195769).

202323431 is a wasteful number, since it uses less digits than its factorization.

202323431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195768.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 202323431 is about 14224.0441155109. The cubic root of 202323431 is about 587.0594189479.

Adding to 202323431 its reverse (134323202), we get a palindrome (336646633).

The spelling of 202323431 in words is "two hundred two million, three hundred twenty-three thousand, four hundred thirty-one".