2215381 has 8 divisors (see below), whose sum is σ = 2665280. Its totient is φ = 1798848.

The previous prime is 2215379. The next prime is 2215387. The reversal of 2215381 is 1835122.

2215381 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2215381 - 2¹ = 2215379 is a prime.

It is a super-2 number, since 2×2215381² = 9815825950322, which contains 22 as substring.

It is a Duffinian number.

2215381 is strictly pandigital in base 8.

2215381 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8196 + ... + 8461.

It is an arithmetic number, because the mean of its divisors is an integer number (333160).

2^2215381 is an apocalyptic number.

It is an amenable number.

2215381 is a deficient number, since it is larger than the sum of its proper divisors (449899).

2215381 is a wasteful number, since it uses less digits than its factorization.

2215381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16683.

The product of its digits is 480, while the sum is 22.

The square root of 2215381 is about 1488.4156005632. The cubic root of 2215381 is about 130.3615379873.

The spelling of 2215381 in words is "two million, two hundred fifteen thousand, three hundred eighty-one".