213240055 has 8 divisors (see below), whose sum is σ = 292443552. Its totient is φ = 146221728.

The previous prime is 213240043. The next prime is 213240067. The reversal of 213240055 is 550042312.

It is an interprime number because it is at equal distance from previous prime (213240043) and next prime (213240067).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213240055 - 2¹⁷ = 213108983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3046252 + ... + 3046321.

It is an arithmetic number, because the mean of its divisors is an integer number (36555444).

Almost surely, 2^213240055 is an apocalyptic number.

213240055 is a deficient number, since it is larger than the sum of its proper divisors (79203497).

213240055 is an equidigital number, since it uses as much as digits as its factorization.

213240055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6092585.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 213240055 is about 14602.7413522256. The cubic root of 213240055 is about 597.4335331023.

Adding to 213240055 its reverse (550042312), we get a palindrome (763282367).

The spelling of 213240055 in words is "two hundred thirteen million, two hundred forty thousand, fifty-five".