31491333441 has 16 divisors (see below), whose sum is σ = 46671284800. Its totient is φ = 20986366464.

The previous prime is 31491333439. The next prime is 31491333449. The reversal of 31491333441 is 14433319413.

31491333441 is a `hidden beast` number, since 314 + 9 + 1 + 3 + 334 + 4 + 1 = 666.

It is not a de Polignac number, because 31491333441 - 2¹ = 31491333439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31491333396 and 31491333405.

It is not an unprimeable number, because it can be changed into a prime (31491333449) 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 15 ways as a sum of consecutive naturals, for example, 144271 + ... + 289476.

It is an arithmetic number, because the mean of its divisors is an integer number (2916955300).

Almost surely, 2^31491333441 is an apocalyptic number.

It is an amenable number.

31491333441 is a deficient number, since it is larger than the sum of its proper divisors (15179951359).

31491333441 is a wasteful number, since it uses less digits than its factorization.

31491333441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436445 (or 436439 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The spelling of 31491333441 in words is "thirty-one billion, four hundred ninety-one million, three hundred thirty-three thousand, four hundred forty-one".