2231816781372 has 12 divisors (see below), whose sum is σ = 5207572489896. Its totient is φ = 743938927120.

The previous prime is 2231816781367. The next prime is 2231816781391. The reversal of 2231816781372 is 2731876181322.

2231816781372 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×2231816781372³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92992365879 + ... + 92992365902.

It is an arithmetic number, because the mean of its divisors is an integer number (433964374158).

Almost surely, 2^{2231816781372} is an apocalyptic number.

It is an amenable number.

2231816781372 is an abundant number, since it is smaller than the sum of its proper divisors (2975755708524).

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

2231816781372 is a wasteful number, since it uses less digits than its factorization.

2231816781372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185984731788 (or 185984731786 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 51.

The spelling of 2231816781372 in words is "two trillion, two hundred thirty-one billion, eight hundred sixteen million, seven hundred eighty-one thousand, three hundred seventy-two".