31434433321 has 16 divisors (see below), whose sum is σ = 35311196160. Its totient is φ = 27807494400.

The previous prime is 31434433307. The next prime is 31434433363. The reversal of 31434433321 is 12333443413.

It is a cyclic number.

It is not a de Polignac number, because 31434433321 - 2⁷ = 31434433193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31434434321) 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, 342130 + ... + 424171.

It is an arithmetic number, because the mean of its divisors is an integer number (2206949760).

Almost surely, 2^31434433321 is an apocalyptic number.

It is an amenable number.

31434433321 is a deficient number, since it is larger than the sum of its proper divisors (3876762839).

31434433321 is a wasteful number, since it uses less digits than its factorization.

31434433321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766464.

The product of its digits is 31104, while the sum is 31.

Adding to 31434433321 its reverse (12333443413), we get a palindrome (43767876734).

The spelling of 31434433321 in words is "thirty-one billion, four hundred thirty-four million, four hundred thirty-three thousand, three hundred twenty-one".