31432303221 has 48 divisors (see below), whose sum is σ = 49088031552. Its totient is φ = 17814551040.

The previous prime is 31432303219. The next prime is 31432303247. The reversal of 31432303221 is 12230323413.

It is not a de Polignac number, because 31432303221 - 2¹ = 31432303219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31432303191 and 31432303200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31432303121) 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 47 ways as a sum of consecutive naturals, for example, 952626 + ... + 985068.

It is an arithmetic number, because the mean of its divisors is an integer number (1022667324).

Almost surely, 2^31432303221 is an apocalyptic number.

It is an amenable number.

31432303221 is a deficient number, since it is larger than the sum of its proper divisors (17655728331).

31432303221 is a wasteful number, since it uses less digits than its factorization.

31432303221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32642 (or 32631 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 31432303221 its reverse (12230323413), we get a palindrome (43662626634).

The spelling of 31432303221 in words is "thirty-one billion, four hundred thirty-two million, three hundred three thousand, two hundred twenty-one".