31442113 has 2 divisors, whose sum is σ = 31442114. Its totient is φ = 31442112.

The previous prime is 31442111. The next prime is 31442141. The reversal of 31442113 is 31124413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27373824 + 4068289 = 5232^2 + 2017^2 .

It is a cyclic number.

It is not a de Polignac number, because 31442113 - 2¹ = 31442111 is a prime.

Together with 31442111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31442111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15721056 + 15721057.

It is an arithmetic number, because the mean of its divisors is an integer number (15721057).

Almost surely, 2^31442113 is an apocalyptic number.

It is an amenable number.

31442113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31442113 is an equidigital number, since it uses as much as digits as its factorization.

31442113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 19.

The square root of 31442113 is about 5607.3267249198. The cubic root of 31442113 is about 315.6244035279.

Adding to 31442113 its reverse (31124413), we get a palindrome (62566526).

The spelling of 31442113 in words is "thirty-one million, four hundred forty-two thousand, one hundred thirteen".