2287881 has 6 divisors (see below), whose sum is σ = 3304730. Its totient is φ = 1525248.

The previous prime is 2287871. The next prime is 2287891. The reversal of 2287881 is 1887822.

It is an interprime number because it is at equal distance from previous prime (2287871) and next prime (2287891).

It can be written as a sum of positive squares in only one way, i.e., 1166400 + 1121481 = 1080^2 + 1059^2 .

It is not a de Polignac number, because 2287881 - 2¹⁴ = 2271497 is a prime.

It is a super-2 number, since 2×2287881² = 10468798940322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2287811) 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, 127096 + ... + 127113.

2^2287881 is an apocalyptic number.

It is an amenable number.

2287881 is a deficient number, since it is larger than the sum of its proper divisors (1016849).

2287881 is a wasteful number, since it uses less digits than its factorization.

2287881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254215 (or 254212 counting only the distinct ones).

The product of its digits is 14336, while the sum is 36.

The square root of 2287881 is about 1512.5742956959. The cubic root of 2287881 is about 131.7683609657.

The spelling of 2287881 in words is "two million, two hundred eighty-seven thousand, eight hundred eighty-one".