31043345 has 8 divisors (see below), whose sum is σ = 37286376. Its totient is φ = 24811776.

The previous prime is 31043339. The next prime is 31043347. The reversal of 31043345 is 54334013.

It can be written as a sum of positive squares in 4 ways, for example, as 7579009 + 23464336 = 2753^2 + 4844^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31043345 - 2⁴ = 31043329 is a prime.

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 31043345.

It is not an unprimeable number, because it can be changed into a prime (31043347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5129 + ... + 9401.

It is an arithmetic number, because the mean of its divisors is an integer number (4660797).

Almost surely, 2^31043345 is an apocalyptic number.

It is an amenable number.

31043345 is a deficient number, since it is larger than the sum of its proper divisors (6243031).

31043345 is a wasteful number, since it uses less digits than its factorization.

31043345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5731.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 31043345 is about 5571.6554990416. The cubic root of 31043345 is about 314.2844090363.

Adding to 31043345 its reverse (54334013), we get a palindrome (85377358).

The spelling of 31043345 in words is "thirty-one million, forty-three thousand, three hundred forty-five".