213992086 has 16 divisors (see below), whose sum is σ = 400193280. Its totient is φ = 83373480.

The previous prime is 213992071. The next prime is 213992089. The reversal of 213992086 is 680299312.

It is a happy number.

It is a super-2 number, since 2×213992086² = 91585225741262792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213992089) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 694626 + ... + 694933.

It is an arithmetic number, because the mean of its divisors is an integer number (25012080).

Almost surely, 2^213992086 is an apocalyptic number.

213992086 is a deficient number, since it is larger than the sum of its proper divisors (186201194).

213992086 is a wasteful number, since it uses less digits than its factorization.

213992086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389579.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 213992086 is about 14628.4683408756. The cubic root of 213992086 is about 598.1350295183.

It can be divided in two parts, 213 and 992086, that added together give a palindrome (992299).

The spelling of 213992086 in words is "two hundred thirteen million, nine hundred ninety-two thousand, eighty-six".