31872836226 has 64 divisors (see below), whose sum is σ = 79784663040. Its totient is φ = 8246415360.

The previous prime is 31872836173. The next prime is 31872836231. The reversal of 31872836226 is 62263827813.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 15486 + ... + 252953.

It is an arithmetic number, because the mean of its divisors is an integer number (1246635360).

Almost surely, 2^31872836226 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31872836226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39892331520).

31872836226 is an abundant number, since it is smaller than the sum of its proper divisors (47911826814).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31872836226 is a wasteful number, since it uses less digits than its factorization.

31872836226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268719.

The product of its digits is 1161216, while the sum is 48.

The spelling of 31872836226 in words is "thirty-one billion, eight hundred seventy-two million, eight hundred thirty-six thousand, two hundred twenty-six".