213445456 has 40 divisors (see below), whose sum is σ = 478344384. Its totient is φ = 90370560.

The previous prime is 213445409. The next prime is 213445499. The reversal of 213445456 is 654544312.

213445456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2185 + ... + 20776.

Almost surely, 2^213445456 is an apocalyptic number.

It is an amenable number.

213445456 is an abundant number, since it is smaller than the sum of its proper divisors (264898928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213445456 is a wasteful number, since it uses less digits than its factorization.

213445456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23059 (or 23053 counting only the distinct ones).

The product of its digits is 57600, while the sum is 34.

The square root of 213445456 is about 14609.7726197227. The cubic root of 213445456 is about 597.6252951760.

Adding to 213445456 its reverse (654544312), we get a palindrome (867989768).

The spelling of 213445456 in words is "two hundred thirteen million, four hundred forty-five thousand, four hundred fifty-six".