202431431 has 2 divisors, whose sum is σ = 202431432. Its totient is φ = 202431430.

The previous prime is 202431413. The next prime is 202431443. The reversal of 202431431 is 134134202.

202431431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (202431413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202431431 is a prime.

It is a super-2 number, since 2×202431431² = 81956968513415522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202431731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101215715 + 101215716.

It is an arithmetic number, because the mean of its divisors is an integer number (101215716).

Almost surely, 2^202431431 is an apocalyptic number.

202431431 is a deficient number, since it is larger than the sum of its proper divisors (1).

202431431 is an equidigital number, since it uses as much as digits as its factorization.

202431431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 202431431 is about 14227.8399976947. The cubic root of 202431431 is about 587.1638575670.

Adding to 202431431 its reverse (134134202), we get a palindrome (336565633).

The spelling of 202431431 in words is "two hundred two million, four hundred thirty-one thousand, four hundred thirty-one".