31113005 has 32 divisors (see below), whose sum is σ = 46891008. Its totient is φ = 19252800.

The previous prime is 31112987. The next prime is 31113011. The reversal of 31113005 is 50031113.

It is not a de Polignac number, because 31113005 - 2¹⁰ = 31111981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 81044 + ... + 81426.

It is an arithmetic number, because the mean of its divisors is an integer number (1465344).

Almost surely, 2^31113005 is an apocalyptic number.

31113005 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31113005 is a deficient number, since it is larger than the sum of its proper divisors (15778003).

31113005 is a wasteful number, since it uses less digits than its factorization.

31113005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617.

The product of its (nonzero) digits is 45, while the sum is 14.

The square root of 31113005 is about 5577.9032799072. The cubic root of 31113005 is about 314.5193138832.

Adding to 31113005 its reverse (50031113), we get a palindrome (81144118).

It can be divided in two parts, 3111 and 3005, that added together give a palindrome (6116).

The spelling of 31113005 in words is "thirty-one million, one hundred thirteen thousand, five".