213540811 has 8 divisors (see below), whose sum is σ = 233063424. Its totient is φ = 194036520.

The previous prime is 213540799. The next prime is 213540851. The reversal of 213540811 is 118045312.

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 213540811 - 2¹¹ = 213538763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213540851) 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, 33870 + ... + 39676.

It is an arithmetic number, because the mean of its divisors is an integer number (29132928).

Almost surely, 2^213540811 is an apocalyptic number.

213540811 is a deficient number, since it is larger than the sum of its proper divisors (19522613).

213540811 is a wasteful number, since it uses less digits than its factorization.

213540811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9161.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 213540811 is about 14613.0356531420. The cubic root of 213540811 is about 597.7142766534.

The spelling of 213540811 in words is "two hundred thirteen million, five hundred forty thousand, eight hundred eleven".