31294105 has 4 divisors (see below), whose sum is σ = 37552932. Its totient is φ = 25035280.

The previous prime is 31294079. The next prime is 31294117. The reversal of 31294105 is 50149213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14055001 + 17239104 = 3749^2 + 4152^2 .

It is not a de Polignac number, because 31294105 - 2¹¹ = 31292057 is a prime.

It is a super-3 number, since 3×31294105³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31294105.

It is an unprimeable number.

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, 3129406 + ... + 3129415.

It is an arithmetic number, because the mean of its divisors is an integer number (9388233).

Almost surely, 2^31294105 is an apocalyptic number.

It is an amenable number.

31294105 is a deficient number, since it is larger than the sum of its proper divisors (6258827).

31294105 is an equidigital number, since it uses as much as digits as its factorization.

31294105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6258826.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 31294105 is about 5594.1134239484. The cubic root of 31294105 is about 315.1283763293.

The spelling of 31294105 in words is "thirty-one million, two hundred ninety-four thousand, one hundred five".