2231855781857 has 16 divisors (see below), whose sum is σ = 2477617051392. Its totient is φ = 1997496698880.

The previous prime is 2231855781833. The next prime is 2231855781863. The reversal of 2231855781857 is 7581875581322.

2231855781857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2231855781857 - 2⁸ = 2231855781601 is a prime.

It is a super-3 number, since 3×2231855781857³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2231855781857.

It is not an unprimeable number, because it can be changed into a prime (2231855781817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17003744 + ... + 17134497.

It is an arithmetic number, because the mean of its divisors is an integer number (154851065712).

Almost surely, 2^{2231855781857} is an apocalyptic number.

It is an amenable number.

2231855781857 is a deficient number, since it is larger than the sum of its proper divisors (245761269535).

2231855781857 is a wasteful number, since it uses less digits than its factorization.

2231855781857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34138408.

The product of its digits is 37632000, while the sum is 62.

The spelling of 2231855781857 in words is "two trillion, two hundred thirty-one billion, eight hundred fifty-five million, seven hundred eighty-one thousand, eight hundred fifty-seven".