31818234549 has 32 divisors (see below), whose sum is σ = 44191065600. Its totient is φ = 20347225920.

The previous prime is 31818234527. The next prime is 31818234599. The reversal of 31818234549 is 94543281813.

It is not a de Polignac number, because 31818234549 - 2⁷ = 31818234421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31818234498 and 31818234507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31818234599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12336142 + ... + 12338720.

It is an arithmetic number, because the mean of its divisors is an integer number (1380970800).

Almost surely, 2^31818234549 is an apocalyptic number.

It is an amenable number.

31818234549 is a deficient number, since it is larger than the sum of its proper divisors (12372831051).

31818234549 is a wasteful number, since it uses less digits than its factorization.

31818234549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4305.

The product of its digits is 829440, while the sum is 48.

The spelling of 31818234549 in words is "thirty-one billion, eight hundred eighteen million, two hundred thirty-four thousand, five hundred forty-nine".