213030656 has 18 divisors (see below), whose sum is σ = 425229672. Its totient is φ = 106515200.

The previous prime is 213030637. The next prime is 213030659. The reversal of 213030656 is 656030312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213030659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415820 + ... + 416331.

Almost surely, 2^213030656 is an apocalyptic number.

It is an amenable number.

213030656 is a deficient number, since it is larger than the sum of its proper divisors (212199016).

213030656 is an frugal number, since it uses more digits than its factorization.

213030656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832167 (or 832153 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 213030656 is about 14595.5697387940. The cubic root of 213030656 is about 597.2379116992.

Adding to 213030656 its reverse (656030312), we get a palindrome (869060968).

The spelling of 213030656 in words is "two hundred thirteen million, thirty thousand, six hundred fifty-six".