31224143442 has 32 divisors (see below), whose sum is σ = 65835245952. Its totient is φ = 9852885504.

The previous prime is 31224143437. The next prime is 31224143443. The reversal of 31224143442 is 24434142213.

It is not an unprimeable number, because it can be changed into a prime (31224143443) 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 15 ways as a sum of consecutive naturals, for example, 1152913 + ... + 1179684.

It is an arithmetic number, because the mean of its divisors is an integer number (2057351436).

Almost surely, 2^31224143442 is an apocalyptic number.

31224143442 is an abundant number, since it is smaller than the sum of its proper divisors (34611102510).

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

31224143442 is a wasteful number, since it uses less digits than its factorization.

31224143442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2332722.

The product of its digits is 18432, while the sum is 30.

Adding to 31224143442 its reverse (24434142213), we get a palindrome (55658285655).

The spelling of 31224143442 in words is "thirty-one billion, two hundred twenty-four million, one hundred forty-three thousand, four hundred forty-two".