2231478917916 has 12 divisors (see below), whose sum is σ = 5206784141832. Its totient is φ = 743826305968.

The previous prime is 2231478917821. The next prime is 2231478917923. The reversal of 2231478917916 is 6197198741322.

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

It is a super-3 number, since 3×2231478917916³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 2231478917916.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 92978288235 + ... + 92978288258.

It is an arithmetic number, because the mean of its divisors is an integer number (433898678486).

Almost surely, 2^{2231478917916} is an apocalyptic number.

It is an amenable number.

2231478917916 is an abundant number, since it is smaller than the sum of its proper divisors (2975305223916).

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

2231478917916 is a wasteful number, since it uses less digits than its factorization.

2231478917916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185956576500 (or 185956576498 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 60.

The spelling of 2231478917916 in words is "two trillion, two hundred thirty-one billion, four hundred seventy-eight million, nine hundred seventeen thousand, nine hundred sixteen".