215443055 has 4 divisors (see below), whose sum is σ = 258531672. Its totient is φ = 172354440.

The previous prime is 215443037. The next prime is 215443079. The reversal of 215443055 is 550344512.

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

It is not a de Polignac number, because 215443055 - 2⁶ = 215442991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21544301 + ... + 21544310.

It is an arithmetic number, because the mean of its divisors is an integer number (64632918).

Almost surely, 2^215443055 is an apocalyptic number.

215443055 is a deficient number, since it is larger than the sum of its proper divisors (43088617).

215443055 is an equidigital number, since it uses as much as digits as its factorization.

215443055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43088616.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 215443055 is about 14677.9785733595. The cubic root of 215443055 is about 599.4838663225.

Adding to 215443055 its reverse (550344512), we get a palindrome (765787567).

The spelling of 215443055 in words is "two hundred fifteen million, four hundred forty-three thousand, fifty-five".