2231816781367 has 2 divisors, whose sum is σ = 2231816781368. Its totient is φ = 2231816781366.

The previous prime is 2231816781331. The next prime is 2231816781391. The reversal of 2231816781367 is 7631876181322.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2231816781367 is a prime.

It is a super-3 number, since 3×2231816781367³ (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 not a weakly prime, because it can be changed into another prime (2231816781767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115908390683 + 1115908390684.

It is an arithmetic number, because the mean of its divisors is an integer number (1115908390684).

Almost surely, 2^{2231816781367} is an apocalyptic number.

2231816781367 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231816781367 is an equidigital number, since it uses as much as digits as its factorization.

2231816781367 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4064256, while the sum is 55.

The spelling of 2231816781367 in words is "two trillion, two hundred thirty-one billion, eight hundred sixteen million, seven hundred eighty-one thousand, three hundred sixty-seven".