31345005 has 32 divisors (see below), whose sum is σ = 51715584. Its totient is φ = 16203776.

The previous prime is 31345001. The next prime is 31345019. The reversal of 31345005 is 50054313.

It is a cyclic number.

It is not a de Polignac number, because 31345005 - 2² = 31345001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31345001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121837 + ... + 122093.

It is an arithmetic number, because the mean of its divisors is an integer number (1616112).

Almost surely, 2^31345005 is an apocalyptic number.

It is an amenable number.

31345005 is a deficient number, since it is larger than the sum of its proper divisors (20370579).

31345005 is a wasteful number, since it uses less digits than its factorization.

31345005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 31345005 is about 5598.6610006322. The cubic root of 31345005 is about 315.2991363474.

Adding to 31345005 its reverse (50054313), we get a palindrome (81399318).

The spelling of 31345005 in words is "thirty-one million, three hundred forty-five thousand, five".