31908161141 has 4 divisors (see below), whose sum is σ = 31908599052. Its totient is φ = 31907723232.

The previous prime is 31908161113. The next prime is 31908161147. The reversal of 31908161141 is 14116180913.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14116180913 = 227 ⋅62185819.

It can be written as a sum of positive squares in 2 ways, for example, as 816244900 + 31091916241 = 28570^2 + 176329^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31908161141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31908161147) 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, 80456 + ... + 265121.

It is an arithmetic number, because the mean of its divisors is an integer number (7977149763).

Almost surely, 2^31908161141 is an apocalyptic number.

It is an amenable number.

31908161141 is a deficient number, since it is larger than the sum of its proper divisors (437911).

31908161141 is an equidigital number, since it uses as much as digits as its factorization.

31908161141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437910.

The product of its (nonzero) digits is 5184, while the sum is 35.

The spelling of 31908161141 in words is "thirty-one billion, nine hundred eight million, one hundred sixty-one thousand, one hundred forty-one".