213496785 has 12 divisors (see below), whose sum is σ = 370061172. Its totient is φ = 113864928.

The previous prime is 213496769. The next prime is 213496807. The reversal of 213496785 is 587694312.

It can be written as a sum of positive squares in 2 ways, for example, as 37748736 + 175748049 = 6144^2 + 13257^2 .

It is not a de Polignac number, because 213496785 - 2⁴ = 213496769 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 4744373 = 213496785 / (2 + 1 + 3 + 4 + 9 + 6 + 7 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 213496785.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2372142 + ... + 2372231.

It is an arithmetic number, because the mean of its divisors is an integer number (30838431).

Almost surely, 2^213496785 is an apocalyptic number.

It is an amenable number.

213496785 is a deficient number, since it is larger than the sum of its proper divisors (156564387).

213496785 is a wasteful number, since it uses less digits than its factorization.

213496785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4744384 (or 4744381 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 213496785 is about 14611.5291807531. The cubic root of 213496785 is about 597.6731966411.

The spelling of 213496785 in words is "two hundred thirteen million, four hundred ninety-six thousand, seven hundred eighty-five".