31730345 has 8 divisors (see below), whose sum is σ = 38962176. Its totient is φ = 24793776.

The previous prime is 31730299. The next prime is 31730353. The reversal of 31730345 is 54303713.

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 31730345 - 2¹⁸ = 31468201 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73577 + ... + 74006.

It is an arithmetic number, because the mean of its divisors is an integer number (4870272).

Almost surely, 2^31730345 is an apocalyptic number.

It is an amenable number.

31730345 is a deficient number, since it is larger than the sum of its proper divisors (7231831).

31730345 is a wasteful number, since it uses less digits than its factorization.

31730345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147631.

The product of its (nonzero) digits is 3780, while the sum is 26.

The square root of 31730345 is about 5632.9694655661. The cubic root of 31730345 is about 316.5859215490.

The spelling of 31730345 in words is "thirty-one million, seven hundred thirty thousand, three hundred forty-five".