31342111 has 4 divisors (see below), whose sum is σ = 31354992. Its totient is φ = 31329232.

The previous prime is 31342097. The next prime is 31342121. The reversal of 31342111 is 11124313.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 31342111 - 2⁹ = 31341599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31342121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1555 + ... + 8068.

It is an arithmetic number, because the mean of its divisors is an integer number (7838748).

Almost surely, 2^31342111 is an apocalyptic number.

31342111 is a deficient number, since it is larger than the sum of its proper divisors (12881).

31342111 is an equidigital number, since it uses as much as digits as its factorization.

31342111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12880.

The product of its digits is 72, while the sum is 16.

The square root of 31342111 is about 5598.4025400109. The cubic root of 31342111 is about 315.2894324750.

Adding to 31342111 its reverse (11124313), we get a palindrome (42466424).

It can be divided in two parts, 313 and 42111, that added together give a palindrome (42424).

The spelling of 31342111 in words is "thirty-one million, three hundred forty-two thousand, one hundred eleven".