31116725867 has 4 divisors (see below), whose sum is σ = 31957718496. Its totient is φ = 30275733240.

The previous prime is 31116725839. The next prime is 31116725903. The reversal of 31116725867 is 76852761113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76852761113 = 227 ⋅338558419.

It is a cyclic number.

It is not a de Polignac number, because 31116725867 - 2²² = 31112531563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31116725807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420496259 + ... + 420496332.

It is an arithmetic number, because the mean of its divisors is an integer number (7989429624).

Almost surely, 2^31116725867 is an apocalyptic number.

31116725867 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

31116725867 is a deficient number, since it is larger than the sum of its proper divisors (840992629).

31116725867 is an equidigital number, since it uses as much as digits as its factorization.

31116725867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840992628.

The product of its digits is 423360, while the sum is 47.

The spelling of 31116725867 in words is "thirty-one billion, one hundred sixteen million, seven hundred twenty-five thousand, eight hundred sixty-seven".