31331113 has 4 divisors (see below), whose sum is σ = 34179408. Its totient is φ = 28482820.

The previous prime is 31331101. The next prime is 31331117. The reversal of 31331113 is 31113313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31331113 - 2⁵ = 31331081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31331117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1424131 + ... + 1424152.

It is an arithmetic number, because the mean of its divisors is an integer number (8544852).

Almost surely, 2^31331113 is an apocalyptic number.

It is an amenable number.

31331113 is a deficient number, since it is larger than the sum of its proper divisors (2848295).

31331113 is a wasteful number, since it uses less digits than its factorization.

31331113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2848294.

The product of its digits is 81, while the sum is 16.

The square root of 31331113 is about 5597.4202093464. The cubic root of 31331113 is about 315.2525496281.

Adding to 31331113 its reverse (31113313), we get a palindrome (62444426).

The spelling of 31331113 in words is "thirty-one million, three hundred thirty-one thousand, one hundred thirteen".