31330440321 has 8 divisors (see below), whose sum is σ = 42792796704. Its totient is φ = 20377522080.

The previous prime is 31330440287. The next prime is 31330440331. The reversal of 31330440321 is 12304403313.

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

It is not a de Polignac number, because 31330440321 - 2¹³ = 31330432129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31330440291 and 31330440300.

It is not an unprimeable number, because it can be changed into a prime (31330440331) 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, 127359391 + ... + 127359636.

It is an arithmetic number, because the mean of its divisors is an integer number (5349099588).

Almost surely, 2^31330440321 is an apocalyptic number.

It is an amenable number.

31330440321 is a deficient number, since it is larger than the sum of its proper divisors (11462356383).

31330440321 is a wasteful number, since it uses less digits than its factorization.

31330440321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254719071.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 31330440321 its reverse (12304403313), we get a palindrome (43634843634).

The spelling of 31330440321 in words is "thirty-one billion, three hundred thirty million, four hundred forty thousand, three hundred twenty-one".