31530646147 has 128 divisors (see below), whose sum is σ = 45984153600. Its totient is φ = 20802355200.

The previous prime is 31530646093. The next prime is 31530646183. The reversal of 31530646147 is 74164603513.

It is a de Polignac number, because none of the positive numbers 2^k-31530646147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31530686147) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 165081822 + ... + 165082012.

It is an arithmetic number, because the mean of its divisors is an integer number (359251200).

Almost surely, 2^31530646147 is an apocalyptic number.

31530646147 is a deficient number, since it is larger than the sum of its proper divisors (14453507453).

31530646147 is a wasteful number, since it uses less digits than its factorization.

31530646147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437.

The product of its (nonzero) digits is 181440, while the sum is 40.

The spelling of 31530646147 in words is "thirty-one billion, five hundred thirty million, six hundred forty-six thousand, one hundred forty-seven".