213642011 has 8 divisors (see below), whose sum is σ = 234630000. Its totient is φ = 192915040.

The previous prime is 213642007. The next prime is 213642041. The reversal of 213642011 is 110246312.

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 213642011 - 2² = 213642007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213642041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63536 + ... + 66813.

It is an arithmetic number, because the mean of its divisors is an integer number (29328750).

Almost surely, 2^213642011 is an apocalyptic number.

213642011 is a deficient number, since it is larger than the sum of its proper divisors (20987989).

213642011 is a wasteful number, since it uses less digits than its factorization.

213642011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130509.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 213642011 is about 14616.4979047650. The cubic root of 213642011 is about 597.8086834814.

Adding to 213642011 its reverse (110246312), we get a palindrome (323888323).

The spelling of 213642011 in words is "two hundred thirteen million, six hundred forty-two thousand, eleven".