31220344442 has 32 divisors (see below), whose sum is σ = 54200247552. Its totient is φ = 13211138304.

The previous prime is 31220344391. The next prime is 31220344453. The reversal of 31220344442 is 24444302213.

It is an unprimeable number.

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, 378548 + ... + 453584.

It is an arithmetic number, because the mean of its divisors is an integer number (1693757736).

Almost surely, 2^31220344442 is an apocalyptic number.

31220344442 is a deficient number, since it is larger than the sum of its proper divisors (22979903110).

31220344442 is a wasteful number, since it uses less digits than its factorization.

31220344442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75422.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 31220344442 its reverse (24444302213), we get a palindrome (55664646655).

The spelling of 31220344442 in words is "thirty-one billion, two hundred twenty million, three hundred forty-four thousand, four hundred forty-two".