142304431 has 2 divisors, whose sum is σ = 142304432. Its totient is φ = 142304430.

The previous prime is 142304429. The next prime is 142304441. The reversal of 142304431 is 134403241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142304431 - 2¹ = 142304429 is a prime.

It is a super-2 number, since 2×142304431² = 40501102164467522, which contains 22 as substring.

Together with 142304429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142304411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71152215 + 71152216.

It is an arithmetic number, because the mean of its divisors is an integer number (71152216).

Almost surely, 2^142304431 is an apocalyptic number.

142304431 is a deficient number, since it is larger than the sum of its proper divisors (1).

142304431 is an equidigital number, since it uses as much as digits as its factorization.

142304431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 142304431 is about 11929.1420898571. The cubic root of 142304431 is about 522.0829066850.

Adding to 142304431 its reverse (134403241), we get a palindrome (276707672).

The spelling of 142304431 in words is "one hundred forty-two million, three hundred four thousand, four hundred thirty-one".