33131131042 has 4 divisors (see below), whose sum is σ = 49696696566. Its totient is φ = 16565565520.

The previous prime is 33131131039. The next prime is 33131131049. The reversal of 33131131042 is 24013113133.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 24267096841 + 8864034201 = 155779^2 + 94149^2 .

It is not an unprimeable number, because it can be changed into a prime (33131131049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8282782759 + ... + 8282782762.

Almost surely, 2^33131131042 is an apocalyptic number.

33131131042 is a deficient number, since it is larger than the sum of its proper divisors (16565565524).

33131131042 is a wasteful number, since it uses less digits than its factorization.

33131131042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16565565523.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 33131131042 its reverse (24013113133), we get a palindrome (57144244175).

The spelling of 33131131042 in words is "thirty-three billion, one hundred thirty-one million, one hundred thirty-one thousand, forty-two".