31061345 has 12 divisors (see below), whose sum is σ = 43359444. Its totient is φ = 21299040.

The previous prime is 31061321. The next prime is 31061353. The reversal of 31061345 is 54316013.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10549504 + 20511841 = 3248^2 + 4529^2 .

It is a de Polignac number, because none of the positive numbers 2^k-31061345 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31061345.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63146 + ... + 63635.

It is an arithmetic number, because the mean of its divisors is an integer number (3613287).

Almost surely, 2^31061345 is an apocalyptic number.

31061345 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31061345 is a deficient number, since it is larger than the sum of its proper divisors (12298099).

31061345 is a wasteful number, since it uses less digits than its factorization.

31061345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126800 (or 126793 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 31061345 is about 5573.2705837775. The cubic root of 31061345 is about 314.3451416057.

Adding to 31061345 its reverse (54316013), we get a palindrome (85377358).

The spelling of 31061345 in words is "thirty-one million, sixty-one thousand, three hundred forty-five".