31613345 has 8 divisors (see below), whose sum is σ = 37991040. Its totient is φ = 25254000.

The previous prime is 31613341. The next prime is 31613357. The reversal of 31613345 is 54331613.

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

It is not a de Polignac number, because 31613345 - 2² = 31613341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31613341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455 + ... + 7964.

It is an arithmetic number, because the mean of its divisors is an integer number (4748880).

Almost surely, 2^31613345 is an apocalyptic number.

It is an amenable number.

31613345 is a deficient number, since it is larger than the sum of its proper divisors (6377695).

31613345 is an equidigital number, since it uses as much as digits as its factorization.

31613345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9175.

The product of its digits is 3240, while the sum is 26.

The square root of 31613345 is about 5622.5745882113. The cubic root of 31613345 is about 316.1963242185.

Adding to 31613345 its reverse (54331613), we get a palindrome (85944958).

The spelling of 31613345 in words is "thirty-one million, six hundred thirteen thousand, three hundred forty-five".