31884342442 has 4 divisors (see below), whose sum is σ = 47826513666. Its totient is φ = 15942171220.

The previous prime is 31884342431. The next prime is 31884342461. The reversal of 31884342442 is 24424348813.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24424348813 = 12379 ⋅1973047.

It can be written as a sum of positive squares in only one way, i.e., 31581199521 + 303142921 = 177711^2 + 17411^2 .

It is a super-2 number, since 2×31884342442² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7971085609 + ... + 7971085612.

Almost surely, 2^31884342442 is an apocalyptic number.

31884342442 is a deficient number, since it is larger than the sum of its proper divisors (15942171224).

31884342442 is a wasteful number, since it uses less digits than its factorization.

31884342442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15942171223.

The product of its digits is 589824, while the sum is 43.

The spelling of 31884342442 in words is "thirty-one billion, eight hundred eighty-four million, three hundred forty-two thousand, four hundred forty-two".