214291491 has 4 divisors (see below), whose sum is σ = 285721992. Its totient is φ = 142860992.

The previous prime is 214291433. The next prime is 214291523. The reversal of 214291491 is 194192412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 214291491 - 2¹³ = 214283299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (214291421) 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 3 ways as a sum of consecutive naturals, for example, 35715246 + ... + 35715251.

It is an arithmetic number, because the mean of its divisors is an integer number (71430498).

Almost surely, 2^214291491 is an apocalyptic number.

214291491 is a deficient number, since it is larger than the sum of its proper divisors (71430501).

214291491 is an equidigital number, since it uses as much as digits as its factorization.

214291491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71430500.

The product of its digits is 5184, while the sum is 33.

The square root of 214291491 is about 14638.6984052545. The cubic root of 214291491 is about 598.4138578389.

The spelling of 214291491 in words is "two hundred fourteen million, two hundred ninety-one thousand, four hundred ninety-one".