214731985 has 16 divisors (see below), whose sum is σ = 281647296. Its totient is φ = 156201408.

The previous prime is 214731971. The next prime is 214731989. The reversal of 214731985 is 589137412.

It is a cyclic number.

It is not a de Polignac number, because 214731985 - 2¹¹ = 214729937 is a prime.

It is a super-2 number, since 2×214731985² = 92219650764080450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (214731989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20299 + ... + 29008.

It is an arithmetic number, because the mean of its divisors is an integer number (17602956).

Almost surely, 2^214731985 is an apocalyptic number.

It is an amenable number.

214731985 is a deficient number, since it is larger than the sum of its proper divisors (66915311).

214731985 is a wasteful number, since it uses less digits than its factorization.

214731985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49392.

The product of its digits is 60480, while the sum is 40.

The square root of 214731985 is about 14653.7362129936. The cubic root of 214731985 is about 598.8236070438.

The spelling of 214731985 in words is "two hundred fourteen million, seven hundred thirty-one thousand, nine hundred eighty-five".