31027109491 has 8 divisors (see below), whose sum is σ = 35487728640. Its totient is φ = 26573534088.

The previous prime is 31027109473. The next prime is 31027109501. The reversal of 31027109491 is 19490172013.

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 31027109491 - 2⁷ = 31027109363 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31027109491.

It is not an unprimeable number, because it can be changed into a prime (31027109441) 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, 1751491 + ... + 1769116.

It is an arithmetic number, because the mean of its divisors is an integer number (4435966080).

Almost surely, 2^31027109491 is an apocalyptic number.

31027109491 is a deficient number, since it is larger than the sum of its proper divisors (4460619149).

31027109491 is a wasteful number, since it uses less digits than its factorization.

31027109491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3521873.

The product of its (nonzero) digits is 13608, while the sum is 37.

The spelling of 31027109491 in words is "thirty-one billion, twenty-seven million, one hundred nine thousand, four hundred ninety-one".