31842113 has 4 divisors (see below), whose sum is σ = 31869828. Its totient is φ = 31814400.

The previous prime is 31842103. The next prime is 31842127. The reversal of 31842113 is 31124813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31124813 = 89 ⋅349717.

It can be written as a sum of positive squares in 2 ways, for example, as 1723969 + 30118144 = 1313^2 + 5488^2 .

It is a cyclic number.

It is not a de Polignac number, because 31842113 - 2⁸ = 31841857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31842103) 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, 12056 + ... + 14457.

It is an arithmetic number, because the mean of its divisors is an integer number (7967457).

Almost surely, 2^31842113 is an apocalyptic number.

It is an amenable number.

31842113 is a deficient number, since it is larger than the sum of its proper divisors (27715).

31842113 is a wasteful number, since it uses less digits than its factorization.

31842113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27714.

The product of its digits is 576, while the sum is 23.

The square root of 31842113 is about 5642.8816220084. The cubic root of 31842113 is about 316.9572034693.

Adding to 31842113 its reverse (31124813), we get a palindrome (62966926).

The spelling of 31842113 in words is "thirty-one million, eight hundred forty-two thousand, one hundred thirteen".