213116805 has 32 divisors (see below), whose sum is σ = 413320320. Its totient is φ = 103328640.

The previous prime is 213116803. The next prime is 213116809. The reversal of 213116805 is 508611312.

It is not a de Polignac number, because 213116805 - 2¹ = 213116803 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213116803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70272 + ... + 73241.

It is an arithmetic number, because the mean of its divisors is an integer number (12916260).

Almost surely, 2^213116805 is an apocalyptic number.

It is an amenable number.

213116805 is a deficient number, since it is larger than the sum of its proper divisors (200203515).

213116805 is a wasteful number, since it uses less digits than its factorization.

213116805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143538 (or 143532 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 213116805 is about 14598.5206442297. The cubic root of 213116805 is about 597.3184079617.

The spelling of 213116805 in words is "two hundred thirteen million, one hundred sixteen thousand, eight hundred five".