213240011 has 4 divisors (see below), whose sum is σ = 213511752. Its totient is φ = 212968272.

The previous prime is 213239989. The next prime is 213240017. The reversal of 213240011 is 110042312.

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 213240011 - 2⁶ = 213239947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213240017) 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, 134690 + ... + 136263.

It is an arithmetic number, because the mean of its divisors is an integer number (53377938).

Almost surely, 2^213240011 is an apocalyptic number.

213240011 is a deficient number, since it is larger than the sum of its proper divisors (271741).

213240011 is an equidigital number, since it uses as much as digits as its factorization.

213240011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271740.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 213240011 is about 14602.7398456591. The cubic root of 213240011 is about 597.4334920108.

Adding to 213240011 its reverse (110042312), we get a palindrome (323282323).

The spelling of 213240011 in words is "two hundred thirteen million, two hundred forty thousand, eleven".