31122242345 has 16 divisors (see below), whose sum is σ = 40374805440. Its totient is φ = 22949884224.

The previous prime is 31122242341. The next prime is 31122242381. The reversal of 31122242345 is 54324222113.

It is a cyclic number.

It is not a de Polignac number, because 31122242345 - 2² = 31122242341 is a prime.

It is a super-2 number, since 2×31122242345² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31122242341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4423547 + ... + 4430576.

It is an arithmetic number, because the mean of its divisors is an integer number (2523425340).

Almost surely, 2^31122242345 is an apocalyptic number.

It is an amenable number.

31122242345 is a deficient number, since it is larger than the sum of its proper divisors (9252563095).

31122242345 is a wasteful number, since it uses less digits than its factorization.

31122242345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8854184.

The product of its digits is 11520, while the sum is 29.

Adding to 31122242345 its reverse (54324222113), we get a palindrome (85446464458).

The spelling of 31122242345 in words is "thirty-one billion, one hundred twenty-two million, two hundred forty-two thousand, three hundred forty-five".