213320785 has 4 divisors (see below), whose sum is σ = 255984948. Its totient is φ = 170656624.

The previous prime is 213320773. The next prime is 213320797. The reversal of 213320785 is 587023312.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (213320773) and next prime (213320797).

It can be written as a sum of positive squares in 2 ways, for example, as 91527489 + 121793296 = 9567^2 + 11036^2 .

It is a cyclic number.

It is not a de Polignac number, because 213320785 - 2²³ = 204932177 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21332074 + ... + 21332083.

It is an arithmetic number, because the mean of its divisors is an integer number (63996237).

Almost surely, 2^213320785 is an apocalyptic number.

It is an amenable number.

213320785 is a deficient number, since it is larger than the sum of its proper divisors (42664163).

213320785 is an equidigital number, since it uses as much as digits as its factorization.

213320785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42664162.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 213320785 is about 14605.5052976609. The cubic root of 213320785 is about 597.5089171945.

The spelling of 213320785 in words is "two hundred thirteen million, three hundred twenty thousand, seven hundred eighty-five".