213323445 has 12 divisors (see below), whose sum is σ = 369760716. Its totient is φ = 113772480.

The previous prime is 213323443. The next prime is 213323489. The reversal of 213323445 is 544323312.

213323445 is a `hidden beast` number, since 213 + 3 + 2 + 3 + 445 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 70257924 + 143065521 = 8382^2 + 11961^2 .

It is not a de Polignac number, because 213323445 - 2¹ = 213323443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213323441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2370216 + ... + 2370305.

It is an arithmetic number, because the mean of its divisors is an integer number (30813393).

Almost surely, 2^213323445 is an apocalyptic number.

It is an amenable number.

213323445 is a deficient number, since it is larger than the sum of its proper divisors (156437271).

213323445 is a wasteful number, since it uses less digits than its factorization.

213323445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4740532 (or 4740529 counting only the distinct ones).

The product of its digits is 8640, while the sum is 27.

The square root of 213323445 is about 14605.5963589304. The cubic root of 213323445 is about 597.5114007267.

Adding to 213323445 its reverse (544323312), we get a palindrome (757646757).

The spelling of 213323445 in words is "two hundred thirteen million, three hundred twenty-three thousand, four hundred forty-five".