2231987 has 8 divisors (see below), whose sum is σ = 2380800. Its totient is φ = 2086344.

The previous prime is 2231941. The next prime is 2232017. The reversal of 2231987 is 7891322.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2231987 - 2⁸ = 2231731 is a prime.

It is a super-3 number, since 3×2231987³ = 33357710633986865409, which contains 333 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 (2231087) 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, 758 + ... + 2244.

It is an arithmetic number, because the mean of its divisors is an integer number (297600).

2^2231987 is an apocalyptic number.

2231987 is a deficient number, since it is larger than the sum of its proper divisors (148813).

2231987 is a wasteful number, since it uses less digits than its factorization.

2231987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1585.

The product of its digits is 6048, while the sum is 32.

The square root of 2231987 is about 1493.9836009809. The cubic root of 2231987 is about 130.6864478186.

The spelling of 2231987 in words is "two million, two hundred thirty-one thousand, nine hundred eighty-seven".