214688287 has 4 divisors (see below), whose sum is σ = 234205416. Its totient is φ = 195171160.

The previous prime is 214688269. The next prime is 214688303. The reversal of 214688287 is 782886412.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-214688287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214688387) 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, 9758548 + ... + 9758569.

It is an arithmetic number, because the mean of its divisors is an integer number (58551354).

Almost surely, 2^214688287 is an apocalyptic number.

214688287 is a deficient number, since it is larger than the sum of its proper divisors (19517129).

214688287 is a wasteful number, since it uses less digits than its factorization.

214688287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19517128.

The product of its digits is 344064, while the sum is 46.

The square root of 214688287 is about 14652.2451180698. The cubic root of 214688287 is about 598.7829840486.

The spelling of 214688287 in words is "two hundred fourteen million, six hundred eighty-eight thousand, two hundred eighty-seven".