213445055 has 4 divisors (see below), whose sum is σ = 256134072. Its totient is φ = 170756040.

The previous prime is 213445027. The next prime is 213445061. The reversal of 213445055 is 550544312.

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

It is not a de Polignac number, because 213445055 - 2⁸ = 213444799 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, 21344501 + ... + 21344510.

It is an arithmetic number, because the mean of its divisors is an integer number (64033518).

Almost surely, 2^213445055 is an apocalyptic number.

213445055 is a deficient number, since it is larger than the sum of its proper divisors (42689017).

213445055 is an equidigital number, since it uses as much as digits as its factorization.

213445055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42689016.

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

The square root of 213445055 is about 14609.7588960256. The cubic root of 213445055 is about 597.6249209229.

Adding to 213445055 its reverse (550544312), we get a palindrome (763989367).

The spelling of 213445055 in words is "two hundred thirteen million, four hundred forty-five thousand, fifty-five".