2231857278377 has 2 divisors, whose sum is σ = 2231857278378. Its totient is φ = 2231857278376.

The previous prime is 2231857278373. The next prime is 2231857278419. The reversal of 2231857278377 is 7738727581322.

2231857278377 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1437514673296 + 794342605081 = 1198964^2 + 891259^2 .

It is a cyclic number.

It is not a de Polignac number, because 2231857278377 - 2² = 2231857278373 is a prime.

It is a super-3 number, since 3×2231857278377³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (2231857278373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115928639188 + 1115928639189.

It is an arithmetic number, because the mean of its divisors is an integer number (1115928639189).

Almost surely, 2^{2231857278377} is an apocalyptic number.

It is an amenable number.

2231857278377 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231857278377 is an equidigital number, since it uses as much as digits as its factorization.

2231857278377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55319040, while the sum is 62.

The spelling of 2231857278377 in words is "two trillion, two hundred thirty-one billion, eight hundred fifty-seven million, two hundred seventy-eight thousand, three hundred seventy-seven".