31223434545042 has 64 divisors (see below), whose sum is σ = 63820182666240. Its totient is φ = 10181413024704.

The previous prime is 31223434545007. The next prime is 31223434545053. The reversal of 31223434545042 is 24054543432213.

It is a junction number, because it is equal to n+sod(n) for n = 31223434544985 and 31223434545003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 520039848 + ... + 520099884.

It is an arithmetic number, because the mean of its divisors is an integer number (997190354160).

Almost surely, 2^{31223434545042} is an apocalyptic number.

31223434545042 is an abundant number, since it is smaller than the sum of its proper divisors (32596748121198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31223434545042 is a wasteful number, since it uses less digits than its factorization.

31223434545042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70367.

The product of its (nonzero) digits is 1382400, while the sum is 42.

Adding to 31223434545042 its reverse (24054543432213), we get a palindrome (55277977977255).

The spelling of 31223434545042 in words is "thirty-one trillion, two hundred twenty-three billion, four hundred thirty-four million, five hundred forty-five thousand, forty-two".