31418931161 has 4 divisors (see below), whose sum is σ = 31458854352. Its totient is φ = 31379007972.

The previous prime is 31418931149. The next prime is 31418931199. The reversal of 31418931161 is 16113981413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31418931161 - 2¹⁴ = 31418914777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31418931121) 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, 19960415 + ... + 19961988.

It is an arithmetic number, because the mean of its divisors is an integer number (7864713588).

Almost surely, 2^31418931161 is an apocalyptic number.

It is an amenable number.

31418931161 is a deficient number, since it is larger than the sum of its proper divisors (39923191).

31418931161 is an equidigital number, since it uses as much as digits as its factorization.

31418931161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39923190.

The product of its digits is 15552, while the sum is 38.

The spelling of 31418931161 in words is "thirty-one billion, four hundred eighteen million, nine hundred thirty-one thousand, one hundred sixty-one".