31320123633465 has 16 divisors (see below), whose sum is σ = 50133139031808. Its totient is φ = 16697085531776.

The previous prime is 31320123633443. The next prime is 31320123633479. The reversal of 31320123633465 is 56433632102313.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31320123633465 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 436238289 + ... + 436310078.

It is an arithmetic number, because the mean of its divisors is an integer number (3133321189488).

Almost surely, 2^{31320123633465} is an apocalyptic number.

It is an amenable number.

31320123633465 is a deficient number, since it is larger than the sum of its proper divisors (18813015398343).

31320123633465 is a wasteful number, since it uses less digits than its factorization.

31320123633465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872550768.

The product of its (nonzero) digits is 699840, while the sum is 42.

Adding to 31320123633465 its reverse (56433632102313), we get a palindrome (87753755735778).

The spelling of 31320123633465 in words is "thirty-one trillion, three hundred twenty billion, one hundred twenty-three million, six hundred thirty-three thousand, four hundred sixty-five".