213085851 has 16 divisors (see below), whose sum is σ = 311075328. Its totient is φ = 128671200.

The previous prime is 213085843. The next prime is 213085867. The reversal of 213085851 is 158580312.

It is a happy number.

It is not a de Polignac number, because 213085851 - 2³ = 213085843 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (213085841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2515 + ... + 20796.

It is an arithmetic number, because the mean of its divisors is an integer number (19442208).

Almost surely, 2^213085851 is an apocalyptic number.

213085851 is a deficient number, since it is larger than the sum of its proper divisors (97989477).

213085851 is a wasteful number, since it uses less digits than its factorization.

213085851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23602.

The product of its (nonzero) digits is 9600, while the sum is 33.

The square root of 213085851 is about 14597.4604298145. The cubic root of 213085851 is about 597.2894875312.

The spelling of 213085851 in words is "two hundred thirteen million, eighty-five thousand, eight hundred fifty-one".