213822986 has 16 divisors (see below), whose sum is σ = 350141064. Its totient is φ = 97334784.

The previous prime is 213822971. The next prime is 213823013. The reversal of 213822986 is 689228312.

It can be written as a sum of positive squares in 4 ways, for example, as 110901961 + 102921025 = 10531^2 + 10145^2 .

It is a Curzon number.

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, 54431 + ... + 58226.

Almost surely, 2^213822986 is an apocalyptic number.

213822986 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

213822986 is a deficient number, since it is larger than the sum of its proper divisors (136318078).

213822986 is a wasteful number, since it uses less digits than its factorization.

213822986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112745.

The product of its digits is 82944, while the sum is 41.

The square root of 213822986 is about 14622.6873727096. The cubic root of 213822986 is about 597.9774360155.

The spelling of 213822986 in words is "two hundred thirteen million, eight hundred twenty-two thousand, nine hundred eighty-six".