31830072321 has 8 divisors (see below), whose sum is σ = 42625425280. Its totient is φ = 21127383792.

The previous prime is 31830072311. The next prime is 31830072343. The reversal of 31830072321 is 12327003813.

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

It is not a de Polignac number, because 31830072321 - 2⁵ = 31830072289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31830072311) 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, 23165305 + ... + 23166678.

It is an arithmetic number, because the mean of its divisors is an integer number (5328178160).

Almost surely, 2^31830072321 is an apocalyptic number.

It is an amenable number.

31830072321 is a deficient number, since it is larger than the sum of its proper divisors (10795352959).

31830072321 is a wasteful number, since it uses less digits than its factorization.

31830072321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46332215.

The product of its (nonzero) digits is 6048, while the sum is 30.

The spelling of 31830072321 in words is "thirty-one billion, eight hundred thirty million, seventy-two thousand, three hundred twenty-one".