213545223 has 6 divisors (see below), whose sum is σ = 308454224. Its totient is φ = 142363476.

The previous prime is 213545203. The next prime is 213545231. The reversal of 213545223 is 322545312.

It is a happy number.

213545223 is a `hidden beast` number, since 2 + 135 + 4 + 522 + 3 = 666.

213545223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213545223 - 2⁵ = 213545191 is a prime.

It is a super-2 number, since 2×213545223² = 91203124532239458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213545203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11863615 + ... + 11863632.

Almost surely, 2^213545223 is an apocalyptic number.

213545223 is a deficient number, since it is larger than the sum of its proper divisors (94909001).

213545223 is a wasteful number, since it uses less digits than its factorization.

213545223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23727253 (or 23727250 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 213545223 is about 14613.1866134666. The cubic root of 213545223 is about 597.7183931143.

The spelling of 213545223 in words is "two hundred thirteen million, five hundred forty-five thousand, two hundred twenty-three".