2237281 has 4 divisors (see below), whose sum is σ = 2268864. Its totient is φ = 2205700.

The previous prime is 2237267. The next prime is 2237293. The reversal of 2237281 is 1827322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2237281 - 2⁹ = 2236769 is a prime.

It is a super-2 number, since 2×2237281² = 10010852545922, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹³ + 2¹⁷ + 3² + 7³ + 2²¹ + 8³ + 1 .

It is a Duffinian number.

2237281 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2237381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15685 + ... + 15826.

It is an arithmetic number, because the mean of its divisors is an integer number (567216).

2^2237281 is an apocalyptic number.

It is an amenable number.

2237281 is a deficient number, since it is larger than the sum of its proper divisors (31583).

2237281 is an equidigital number, since it uses as much as digits as its factorization.

2237281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31582.

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

The square root of 2237281 is about 1495.7543247472. The cubic root of 2237281 is about 130.7896903220.

It can be divided in two parts, 223728 and 1, that added together give a square (223729 = 473²).

The spelling of 2237281 in words is "two million, two hundred thirty-seven thousand, two hundred eighty-one".