213243064 has 16 divisors (see below), whose sum is σ = 400968720. Its totient is φ = 106318080.

The previous prime is 213243049. The next prime is 213243067. The reversal of 213243064 is 460342312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213243067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34932 + ... + 40579.

It is an arithmetic number, because the mean of its divisors is an integer number (25060545).

Almost surely, 2^213243064 is an apocalyptic number.

It is an amenable number.

213243064 is a deficient number, since it is larger than the sum of its proper divisors (187725656).

213243064 is a wasteful number, since it uses less digits than its factorization.

213243064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75870 (or 75866 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 213243064 is about 14602.8443804623. The cubic root of 213243064 is about 597.4363431889.

Adding to 213243064 its reverse (460342312), we get a palindrome (673585376).

The spelling of 213243064 in words is "two hundred thirteen million, two hundred forty-three thousand, sixty-four".