31530642145 has 8 divisors (see below), whose sum is σ = 37917794304. Its totient is φ = 25170497904.

The previous prime is 31530642113. The next prime is 31530642151. The reversal of 31530642145 is 54124603513.

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

It is a cyclic number.

It is not a de Polignac number, because 31530642145 - 2⁵ = 31530642113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31530642145.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6749409 + ... + 6754078.

It is an arithmetic number, because the mean of its divisors is an integer number (4739724288).

Almost surely, 2^31530642145 is an apocalyptic number.

It is an amenable number.

31530642145 is a deficient number, since it is larger than the sum of its proper divisors (6387152159).

31530642145 is a wasteful number, since it uses less digits than its factorization.

31530642145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13503959.

The product of its (nonzero) digits is 43200, while the sum is 34.

The spelling of 31530642145 in words is "thirty-one billion, five hundred thirty million, six hundred forty-two thousand, one hundred forty-five".