2271380 has 18 divisors (see below), whose sum is σ = 4784094. Its totient is φ = 905856.

The previous prime is 2271377. The next prime is 2271383. The reversal of 2271380 is 831722.

It is an interprime number because it is at equal distance from previous prime (2271377) and next prime (2271383).

It can be written as a sum of positive squares in 3 ways, for example, as 15376 + 2256004 = 124^2 + 1502^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2271383) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6572 + ... + 6908.

It is an arithmetic number, because the mean of its divisors is an integer number (265783).

2^2271380 is an apocalyptic number.

2271380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2271380 is an abundant number, since it is smaller than the sum of its proper divisors (2512714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2271380 is an equidigital number, since it uses as much as digits as its factorization.

2271380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 2271380 is about 1507.1098168349. The cubic root of 2271380 is about 131.4508097665.

The spelling of 2271380 in words is "two million, two hundred seventy-one thousand, three hundred eighty".