219105045 has 24 divisors (see below), whose sum is σ = 381430296. Its totient is φ = 116348928.

The previous prime is 219105013. The next prime is 219105053. The reversal of 219105045 is 540501912.

219105045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 9492561 + 209612484 = 3081^2 + 14478^2 .

It is not a de Polignac number, because 219105045 - 2⁵ = 219105013 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37 + ... + 20933.

It is an arithmetic number, because the mean of its divisors is an integer number (15892929).

Almost surely, 2^219105045 is an apocalyptic number.

It is an amenable number.

219105045 is a deficient number, since it is larger than the sum of its proper divisors (162325251).

219105045 is a wasteful number, since it uses less digits than its factorization.

219105045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21141 (or 21138 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 219105045 is about 14802.1973031033. The cubic root of 219105045 is about 602.8613742041.

Adding to 219105045 its reverse (540501912), we get a palindrome (759606957).

The spelling of 219105045 in words is "two hundred nineteen million, one hundred five thousand, forty-five".