2272381 has 8 divisors (see below), whose sum is σ = 2408000. Its totient is φ = 2138400.

The previous prime is 2272379. The next prime is 2272397. The reversal of 2272381 is 1832722.

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

It is a 5-Lehmer number, since φ(2272381) divides (2272381-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 2272381 - 2¹ = 2272379 is a prime.

It is a super-2 number, since 2×2272381² = 10327430818322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

2272381 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2272301) 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, 3481 + ... + 4081.

It is an arithmetic number, because the mean of its divisors is an integer number (301000).

2^2272381 is an apocalyptic number.

It is an amenable number.

2272381 is a deficient number, since it is larger than the sum of its proper divisors (135619).

2272381 is a wasteful number, since it uses less digits than its factorization.

2272381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819.

The product of its digits is 1344, while the sum is 25.

The square root of 2272381 is about 1507.4418728429. The cubic root of 2272381 is about 131.4701171092.

The spelling of 2272381 in words is "two million, two hundred seventy-two thousand, three hundred eighty-one".