31042323161 has 8 divisors (see below), whose sum is σ = 31196689920. Its totient is φ = 30888232192.

The previous prime is 31042323157. The next prime is 31042323197. The reversal of 31042323161 is 16132324013.

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 31042323161 - 2² = 31042323157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31042323161.

It is not an unprimeable number, because it can be changed into a prime (31042323061) 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, 158585 + ... + 295353.

It is an arithmetic number, because the mean of its divisors is an integer number (3899586240).

Almost surely, 2^31042323161 is an apocalyptic number.

It is an amenable number.

31042323161 is a deficient number, since it is larger than the sum of its proper divisors (154366759).

31042323161 is a wasteful number, since it uses less digits than its factorization.

31042323161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137895.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 31042323161 its reverse (16132324013), we get a palindrome (47174647174).

The spelling of 31042323161 in words is "thirty-one billion, forty-two million, three hundred twenty-three thousand, one hundred sixty-one".