31420343 has 2 divisors, whose sum is σ = 31420344. Its totient is φ = 31420342.

The previous prime is 31420327. The next prime is 31420379. The reversal of 31420343 is 34302413.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31420343 - 2⁴ = 31420327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31420303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15710171 + 15710172.

It is an arithmetic number, because the mean of its divisors is an integer number (15710172).

Almost surely, 2^31420343 is an apocalyptic number.

31420343 is a deficient number, since it is larger than the sum of its proper divisors (1).

31420343 is an equidigital number, since it uses as much as digits as its factorization.

31420343 is an evil number, because the sum of its binary digits is even.

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

The square root of 31420343 is about 5605.3851785582. The cubic root of 31420343 is about 315.5515423338.

Adding to 31420343 its reverse (34302413), we get a palindrome (65722756).

The spelling of 31420343 in words is "thirty-one million, four hundred twenty thousand, three hundred forty-three".