31145345153321 has 8 divisors (see below), whose sum is σ = 35594841414720. Its totient is φ = 26695889201808.

The previous prime is 31145345153311. The next prime is 31145345153357. The reversal of 31145345153321 is 12335154354113.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31145345153321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31145345153311) 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, 8403251 + ... + 11528456.

It is an arithmetic number, because the mean of its divisors is an integer number (4449355176840).

Almost surely, 2^{31145345153321} is an apocalyptic number.

It is an amenable number.

31145345153321 is a deficient number, since it is larger than the sum of its proper divisors (4449496261399).

31145345153321 is a wasteful number, since it uses less digits than its factorization.

31145345153321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20154943.

The product of its digits is 324000, while the sum is 41.

The spelling of 31145345153321 in words is "thirty-one trillion, one hundred forty-five billion, three hundred forty-five million, one hundred fifty-three thousand, three hundred twenty-one".