31222336545 has 80 divisors (see below), whose sum is σ = 56683547712. Its totient is φ = 16440278400.

The previous prime is 31222336531. The next prime is 31222336547. The reversal of 31222336545 is 54563322213.

31222336545 is a `hidden beast` number, since 31 + 2 + 223 + 365 + 45 = 666.

It is not a de Polignac number, because 31222336545 - 2⁵ = 31222336513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31222336547) 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 79 ways as a sum of consecutive naturals, for example, 18120054 + ... + 18121776.

Almost surely, 2^31222336545 is an apocalyptic number.

It is an amenable number.

31222336545 is a deficient number, since it is larger than the sum of its proper divisors (25461211167).

31222336545 is a wasteful number, since it uses less digits than its factorization.

31222336545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2284 (or 2275 counting only the distinct ones).

The product of its digits is 129600, while the sum is 36.

Adding to 31222336545 its reverse (54563322213), we get a palindrome (85785658758).

The spelling of 31222336545 in words is "thirty-one billion, two hundred twenty-two million, three hundred thirty-six thousand, five hundred forty-five".