213047986 has 16 divisors (see below), whose sum is σ = 323364888. Its totient is φ = 105264000.

The previous prime is 213047971. The next prime is 213047999. The reversal of 213047986 is 689740312.

It can be written as a sum of positive squares in 4 ways, for example, as 200930625 + 12117361 = 14175^2 + 3481^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205726 + ... + 206758.

Almost surely, 2^213047986 is an apocalyptic number.

213047986 is a deficient number, since it is larger than the sum of its proper divisors (110316902).

213047986 is a wasteful number, since it uses less digits than its factorization.

213047986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2157.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 213047986 is about 14596.1634000171. The cubic root of 213047986 is about 597.2541063204.

The spelling of 213047986 in words is "two hundred thirteen million, forty-seven thousand, nine hundred eighty-six".