213505045 has 8 divisors (see below), whose sum is σ = 275914296. Its totient is φ = 157665216.

The previous prime is 213505043. The next prime is 213505049. The reversal of 213505045 is 540505312.

213505045 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 315844 + 213189201 = 562^2 + 14601^2 .

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 213505045 - 2¹ = 213505043 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213505043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1642282 + ... + 1642411.

It is an arithmetic number, because the mean of its divisors is an integer number (34489287).

Almost surely, 2^213505045 is an apocalyptic number.

It is an amenable number.

213505045 is a deficient number, since it is larger than the sum of its proper divisors (62409251).

213505045 is a wasteful number, since it uses less digits than its factorization.

213505045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3284711.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 213505045 is about 14611.8118315286. The cubic root of 213505045 is about 597.6809043558.

The spelling of 213505045 in words is "two hundred thirteen million, five hundred five thousand, forty-five".