213606646 has 32 divisors (see below), whose sum is σ = 355116960. Its totient is φ = 95558400.

The previous prime is 213606643. The next prime is 213606703. The reversal of 213606646 is 646606312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213606641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 673680 + ... + 673996.

It is an arithmetic number, because the mean of its divisors is an integer number (11097405).

Almost surely, 2^213606646 is an apocalyptic number.

213606646 is a deficient number, since it is larger than the sum of its proper divisors (141510314).

213606646 is a wasteful number, since it uses less digits than its factorization.

213606646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 213606646 is about 14615.2880915841. The cubic root of 213606646 is about 597.7756957891.

The spelling of 213606646 in words is "two hundred thirteen million, six hundred six thousand, six hundred forty-six".