2159381 has 12 divisors (see below), whose sum is σ = 2539008. Its totient is φ = 1831032.

The previous prime is 2159363. The next prime is 2159383. The reversal of 2159381 is 1839512.

It is not a de Polignac number, because 2159381 - 2¹⁰ = 2158357 is a prime.

It is a super-2 number, since 2×2159381² = 9325852606322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2159383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6050 + ... + 6396.

It is an arithmetic number, because the mean of its divisors is an integer number (211584).

2^2159381 is an apocalyptic number.

It is an amenable number.

2159381 is a deficient number, since it is larger than the sum of its proper divisors (379627).

2159381 is a wasteful number, since it uses less digits than its factorization.

2159381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 481 counting only the distinct ones).

The product of its digits is 2160, while the sum is 29.

The square root of 2159381 is about 1469.4832425040. The cubic root of 2159381 is about 129.2537321196.

The spelling of 2159381 in words is "two million, one hundred fifty-nine thousand, three hundred eighty-one".