2231857278379 has 4 divisors (see below), whose sum is σ = 2328894551376. Its totient is φ = 2134820005384.

The previous prime is 2231857278377. The next prime is 2231857278419. The reversal of 2231857278379 is 9738727581322.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2231857278379 - 2¹ = 2231857278377 is a prime.

It is a super-3 number, since 3×2231857278379³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 2231857278379.

It is not an unprimeable number, because it can be changed into a prime (2231857278373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48518636464 + ... + 48518636509.

It is an arithmetic number, because the mean of its divisors is an integer number (582223637844).

Almost surely, 2^{2231857278379} is an apocalyptic number.

2231857278379 is a deficient number, since it is larger than the sum of its proper divisors (97037272997).

2231857278379 is an equidigital number, since it uses as much as digits as its factorization.

2231857278379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97037272996.

The product of its digits is 71124480, while the sum is 64.

The spelling of 2231857278379 in words is "two trillion, two hundred thirty-one billion, eight hundred fifty-seven million, two hundred seventy-eight thousand, three hundred seventy-nine".