2163693381 has 16 divisors (see below), whose sum is σ = 3051171840. Its totient is φ = 1360059120.

The previous prime is 2163693361. The next prime is 2163693397. The reversal of 2163693381 is 1833963612.

2163693381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2163693381 - 2¹¹ = 2163691333 is a prime.

It is a super-2 number, since 2×2163693381² = 9363138093966422322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163693361) 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, 77925 + ... + 101978.

It is an arithmetic number, because the mean of its divisors is an integer number (190698240).

Almost surely, 2^2163693381 is an apocalyptic number.

It is an amenable number.

2163693381 is a deficient number, since it is larger than the sum of its proper divisors (887478459).

2163693381 is a wasteful number, since it uses less digits than its factorization.

2163693381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180136.

The product of its digits is 139968, while the sum is 42.

The square root of 2163693381 is about 46515.5176365909. The cubic root of 2163693381 is about 1293.3971674587.

The spelling of 2163693381 in words is "two billion, one hundred sixty-three million, six hundred ninety-three thousand, three hundred eighty-one".