2265381 has 8 divisors (see below), whose sum is σ = 3356160. Its totient is φ = 1510236.

The previous prime is 2265377. The next prime is 2265391. The reversal of 2265381 is 1835622.

2265381 is a `hidden beast` number, since 2 + 2 + 653 + 8 + 1 = 666.

It is not a de Polignac number, because 2265381 - 2² = 2265377 is a prime.

It is a super-2 number, since 2×2265381² = 10263902150322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 83903 = 2265381 / (2 + 2 + 6 + 5 + 3 + 8 + 1).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2265331) 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, 41925 + ... + 41978.

It is an arithmetic number, because the mean of its divisors is an integer number (419520).

2^2265381 is an apocalyptic number.

It is an amenable number.

2265381 is a deficient number, since it is larger than the sum of its proper divisors (1090779).

2265381 is an equidigital number, since it uses as much as digits as its factorization.

2265381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83912 (or 83906 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 2265381 is about 1505.1182677783. The cubic root of 2265381 is about 131.3349816989.

The spelling of 2265381 in words is "two million, two hundred sixty-five thousand, three hundred eighty-one".