213608611 has 4 divisors (see below), whose sum is σ = 213660400. Its totient is φ = 213556824.

The previous prime is 213608599. The next prime is 213608617. The reversal of 213608611 is 116806312.

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

It is a cyclic number.

It is not a de Polignac number, because 213608611 - 2⁵ = 213608579 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 213608611.

It is not an unprimeable number, because it can be changed into a prime (213608617) 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, 19116 + ... + 28153.

It is an arithmetic number, because the mean of its divisors is an integer number (53415100).

Almost surely, 2^213608611 is an apocalyptic number.

213608611 is a deficient number, since it is larger than the sum of its proper divisors (51789).

213608611 is an equidigital number, since it uses as much as digits as its factorization.

213608611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51788.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 213608611 is about 14615.3553155577. The cubic root of 213608611 is about 597.7775287933. Note that the first 3 decimals are identical.

The spelling of 213608611 in words is "two hundred thirteen million, six hundred eight thousand, six hundred eleven".