213628187 has 8 divisors (see below), whose sum is σ = 214801536. Its totient is φ = 212458752.

The previous prime is 213628183. The next prime is 213628189. The reversal of 213628187 is 781826312.

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 213628187 - 2² = 213628183 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213628187.

It is not an unprimeable number, because it can be changed into a prime (213628183) 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, 213773 + ... + 214769.

It is an arithmetic number, because the mean of its divisors is an integer number (26850192).

Almost surely, 2^213628187 is an apocalyptic number.

213628187 is a deficient number, since it is larger than the sum of its proper divisors (1173349).

213628187 is an equidigital number, since it uses as much as digits as its factorization.

213628187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1957.

The product of its digits is 32256, while the sum is 38.

The square root of 213628187 is about 14616.0250068204. The cubic root of 213628187 is about 597.7957891924.

The spelling of 213628187 in words is "two hundred thirteen million, six hundred twenty-eight thousand, one hundred eighty-seven".