31371141133 has 4 divisors (see below), whose sum is σ = 31372861468. Its totient is φ = 31369420800.

The previous prime is 31371141127. The next prime is 31371141143. The reversal of 31371141133 is 33114117313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33114117313 = 23 ⋅1439744231.

It can be written as a sum of positive squares in 2 ways, for example, as 19914007689 + 11457133444 = 141117^2 + 107038^2 .

It is a cyclic number.

It is not a de Polignac number, because 31371141133 - 2⁵ = 31371141101 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 (31371141143) 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, 832518 + ... + 869383.

It is an arithmetic number, because the mean of its divisors is an integer number (7843215367).

Almost surely, 2^31371141133 is an apocalyptic number.

It is an amenable number.

31371141133 is a deficient number, since it is larger than the sum of its proper divisors (1720335).

31371141133 is a wasteful number, since it uses less digits than its factorization.

31371141133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720334.

The product of its digits is 2268, while the sum is 28.

Adding to 31371141133 its reverse (33114117313), we get a palindrome (64485258446).

The spelling of 31371141133 in words is "thirty-one billion, three hundred seventy-one million, one hundred forty-one thousand, one hundred thirty-three".