31321240233 has 16 divisors (see below), whose sum is σ = 42379084800. Its totient is φ = 20574149904.

The previous prime is 31321240229. The next prime is 31321240273. The reversal of 31321240233 is 33204212313.

It is not a de Polignac number, because 31321240233 - 2² = 31321240229 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31321240273) 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, 193191 + ... + 316172.

It is an arithmetic number, because the mean of its divisors is an integer number (2648692800).

Almost surely, 2^31321240233 is an apocalyptic number.

It is an amenable number.

31321240233 is a deficient number, since it is larger than the sum of its proper divisors (11057844567).

31321240233 is a wasteful number, since it uses less digits than its factorization.

31321240233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509668.

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

Adding to 31321240233 its reverse (33204212313), we get a palindrome (64525452546).

The spelling of 31321240233 in words is "thirty-one billion, three hundred twenty-one million, two hundred forty thousand, two hundred thirty-three".