31132320099 has 32 divisors (see below), whose sum is σ = 44207804160. Its totient is φ = 19487866496.

The previous prime is 31132320071. The next prime is 31132320101. The reversal of 31132320099 is 99002323113.

It is not a de Polignac number, because 31132320099 - 2⁷ = 31132319971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31132320029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6880852 + ... + 6885374.

It is an arithmetic number, because the mean of its divisors is an integer number (1381493880).

Almost surely, 2^31132320099 is an apocalyptic number.

31132320099 is a deficient number, since it is larger than the sum of its proper divisors (13075484061).

31132320099 is an equidigital number, since it uses as much as digits as its factorization.

31132320099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5044 (or 5010 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 33.

The spelling of 31132320099 in words is "thirty-one billion, one hundred thirty-two million, three hundred twenty thousand, ninety-nine".