31230331321 has 8 divisors (see below), whose sum is σ = 37791325440. Its totient is φ = 25194216768.

The previous prime is 31230331303. The next prime is 31230331417. The reversal of 31230331321 is 12313303213.

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

It is not a de Polignac number, because 31230331321 - 2¹³ = 31230323129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31230331292 and 31230331301.

It is not an unprimeable number, because it can be changed into a prime (31230331921) 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, 131219761 + ... + 131219998.

It is an arithmetic number, because the mean of its divisors is an integer number (4723915680).

Almost surely, 2^31230331321 is an apocalyptic number.

It is an amenable number.

31230331321 is a deficient number, since it is larger than the sum of its proper divisors (6560994119).

31230331321 is a wasteful number, since it uses less digits than its factorization.

31230331321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262439783.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 31230331321 its reverse (12313303213), we get a palindrome (43543634534).

The spelling of 31230331321 in words is "thirty-one billion, two hundred thirty million, three hundred thirty-one thousand, three hundred twenty-one".