2231687 has 2 divisors, whose sum is σ = 2231688. Its totient is φ = 2231686.

The previous prime is 2231681. The next prime is 2231707. The reversal of 2231687 is 7861322.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2231687 - 2⁶ = 2231623 is a prime.

It is a super-3 number, since 3×2231687³ = 33344261673701279109, which contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2231681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115843 + 1115844.

It is an arithmetic number, because the mean of its divisors is an integer number (1115844).

2^2231687 is an apocalyptic number.

2231687 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231687 is an equidigital number, since it uses as much as digits as its factorization.

2231687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 29.

The square root of 2231687 is about 1493.8831948984. The cubic root of 2231687 is about 130.6805923945.

The spelling of 2231687 in words is "two million, two hundred thirty-one thousand, six hundred eighty-seven".