214531081 has 2 divisors, whose sum is σ = 214531082. Its totient is φ = 214531080.

The previous prime is 214531063. The next prime is 214531099. The reversal of 214531081 is 180135412.

It is a balanced prime because it is at equal distance from previous prime (214531063) and next prime (214531099).

It can be written as a sum of positive squares in only one way, i.e., 169520400 + 45010681 = 13020^2 + 6709^2 .

It is a cyclic number.

It is not a de Polignac number, because 214531081 - 2²⁷ = 80313353 is a prime.

It is a super-2 number, since 2×214531081² = 92047169430057122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (214531001) 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 as a sum of consecutive naturals, namely, 107265540 + 107265541.

It is an arithmetic number, because the mean of its divisors is an integer number (107265541).

Almost surely, 2^214531081 is an apocalyptic number.

214531081 is the 9264-th centered pentagonal number.

It is an amenable number.

214531081 is a deficient number, since it is larger than the sum of its proper divisors (1).

214531081 is an equidigital number, since it uses as much as digits as its factorization.

214531081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 214531081 is about 14646.8795652863. The cubic root of 214531081 is about 598.6367949471.

Adding to 214531081 its reverse (180135412), we get a palindrome (394666493).

The spelling of 214531081 in words is "two hundred fourteen million, five hundred thirty-one thousand, eighty-one".