213288687 has 8 divisors (see below), whose sum is σ = 315983280. Its totient is φ = 142192440.

The previous prime is 213288667. The next prime is 213288697. The reversal of 213288687 is 786882312.

It is not a de Polignac number, because 213288687 - 2⁸ = 213288431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213288617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3949764 + ... + 3949817.

It is an arithmetic number, because the mean of its divisors is an integer number (39497910).

Almost surely, 2^213288687 is an apocalyptic number.

213288687 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

213288687 is a deficient number, since it is larger than the sum of its proper divisors (102694593).

213288687 is an equidigital number, since it uses as much as digits as its factorization.

213288687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7899590 (or 7899584 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 213288687 is about 14604.4064240900. The cubic root of 213288687 is about 597.4789469890.

The spelling of 213288687 in words is "two hundred thirteen million, two hundred eighty-eight thousand, six hundred eighty-seven".