2237881 has 4 divisors (see below), whose sum is σ = 2259712. Its totient is φ = 2216052.

The previous prime is 2237861. The next prime is 2237899. The reversal of 2237881 is 1887322.

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 2237881 - 2⁹ = 2237369 is a prime.

It is a super-2 number, since 2×2237881² = 10016222740322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2237861) 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, 10761 + ... + 10966.

It is an arithmetic number, because the mean of its divisors is an integer number (564928).

2^2237881 is an apocalyptic number.

It is an amenable number.

2237881 is a deficient number, since it is larger than the sum of its proper divisors (21831).

2237881 is a wasteful number, since it uses less digits than its factorization.

2237881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21830.

The product of its digits is 5376, while the sum is 31.

The square root of 2237881 is about 1495.9548789987. The cubic root of 2237881 is about 130.8013811199.

The spelling of 2237881 in words is "two million, two hundred thirty-seven thousand, eight hundred eighty-one".