31533423345 has 24 divisors (see below), whose sum is σ = 56135178216. Its totient is φ = 16363289088.

The previous prime is 31533423343. The next prime is 31533423371. The reversal of 31533423345 is 54332433513.

31533423345 is a `hidden beast` number, since 315 + 3 + 3 + 4 + 2 + 334 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 15294763584 + 16238659761 = 123672^2 + 127431^2 .

It is not a de Polignac number, because 31533423345 - 2¹ = 31533423343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31533423343) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9467832 + ... + 9471161.

It is an arithmetic number, because the mean of its divisors is an integer number (2338965759).

Almost surely, 2^31533423345 is an apocalyptic number.

It is an amenable number.

31533423345 is a deficient number, since it is larger than the sum of its proper divisors (24601754871).

31533423345 is a wasteful number, since it uses less digits than its factorization.

31533423345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18939041 (or 18939038 counting only the distinct ones).

The product of its digits is 194400, while the sum is 36.

Adding to 31533423345 its reverse (54332433513), we get a palindrome (85865856858).

The spelling of 31533423345 in words is "thirty-one billion, five hundred thirty-three million, four hundred twenty-three thousand, three hundred forty-five".