30971291481 has 24 divisors (see below), whose sum is σ = 48183495360. Its totient is φ = 19056910176.

The previous prime is 30971291459. The next prime is 30971291557. The reversal of 30971291481 is 18419217903.

It is not a de Polignac number, because 30971291481 - 2⁹ = 30971290969 is a prime.

It is a super-2 number, since 2×30971291481² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30971291431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1796380 + ... + 1813538.

It is an arithmetic number, because the mean of its divisors is an integer number (2007645640).

Almost surely, 2^30971291481 is an apocalyptic number.

It is an amenable number.

30971291481 is a deficient number, since it is larger than the sum of its proper divisors (17212203879).

30971291481 is a wasteful number, since it uses less digits than its factorization.

30971291481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32605 (or 32602 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The spelling of 30971291481 in words is "thirty billion, nine hundred seventy-one million, two hundred ninety-one thousand, four hundred eighty-one".