31223352042 has 40 divisors (see below), whose sum is σ = 73645730400. Its totient is φ = 9860004936.

The previous prime is 31223352037. The next prime is 31223352049. The reversal of 31223352042 is 24025332213.

31223352042 is a `hidden beast` number, since 3 + 122 + 335 + 204 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 31223351997 and 31223352015.

It is not an unprimeable number, because it can be changed into a prime (31223352049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5068942 + ... + 5075097.

It is an arithmetic number, because the mean of its divisors is an integer number (1841143260).

Almost surely, 2^31223352042 is an apocalyptic number.

31223352042 is an abundant number, since it is smaller than the sum of its proper divisors (42422378358).

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

31223352042 is a wasteful number, since it uses less digits than its factorization.

31223352042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10144072 (or 10144063 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 31223352042 its reverse (24025332213), we get a palindrome (55248684255).

The spelling of 31223352042 in words is "thirty-one billion, two hundred twenty-three million, three hundred fifty-two thousand, forty-two".