213430785 has 16 divisors (see below), whose sum is σ = 343227456. Its totient is φ = 113250368.

The previous prime is 213430771. The next prime is 213430817. The reversal of 213430785 is 587034312.

It is a cyclic number.

It is not a de Polignac number, because 213430785 - 2¹³ = 213422593 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33159 + ... + 39068.

It is an arithmetic number, because the mean of its divisors is an integer number (21451716).

Almost surely, 2^213430785 is an apocalyptic number.

It is an amenable number.

213430785 is a deficient number, since it is larger than the sum of its proper divisors (129796671).

213430785 is a wasteful number, since it uses less digits than its factorization.

213430785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72432.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 213430785 is about 14609.2705156692. The cubic root of 213430785 is about 597.6116024326.

The spelling of 213430785 in words is "two hundred thirteen million, four hundred thirty thousand, seven hundred eighty-five".