213533087 has 4 divisors (see below), whose sum is σ = 216720216. Its totient is φ = 210345960.

The previous prime is 213533063. The next prime is 213533137. The reversal of 213533087 is 780335312.

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-213533087 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 (213533017) 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, 1593464 + ... + 1593597.

It is an arithmetic number, because the mean of its divisors is an integer number (54180054).

Almost surely, 2^213533087 is an apocalyptic number.

213533087 is a deficient number, since it is larger than the sum of its proper divisors (3187129).

213533087 is an equidigital number, since it uses as much as digits as its factorization.

213533087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3187128.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 213533087 is about 14612.7713661714. The cubic root of 213533087 is about 597.7070699111.

Adding to 213533087 its reverse (780335312), we get a palindrome (993868399).

The spelling of 213533087 in words is "two hundred thirteen million, five hundred thirty-three thousand, eighty-seven".