30315993 has 8 divisors (see below), whose sum is σ = 40537248. Its totient is φ = 20152704.

The previous prime is 30315983. The next prime is 30316021. The reversal of 30315993 is 39951303.

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

It is a de Polignac number, because none of the positive numbers 2^k-30315993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30315983) 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, 13255 + ... + 15372.

It is an arithmetic number, because the mean of its divisors is an integer number (5067156).

Almost surely, 2^30315993 is an apocalyptic number.

It is an amenable number.

30315993 is a deficient number, since it is larger than the sum of its proper divisors (10221255).

30315993 is a wasteful number, since it uses less digits than its factorization.

30315993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28983.

The product of its (nonzero) digits is 10935, while the sum is 33.

The square root of 30315993 is about 5505.9960951675. The cubic root of 30315993 is about 311.8104021481.

The spelling of 30315993 in words is "thirty million, three hundred fifteen thousand, nine hundred ninety-three".