213668410 has 16 divisors (see below), whose sum is σ = 407227176. Its totient is φ = 80439808.

The previous prime is 213668401. The next prime is 213668417. The reversal of 213668410 is 14866312.

It is a happy number.

213668410 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 128346241 + 85322169 = 11329^2 + 9237^2 .

It is not an unprimeable number, because it can be changed into a prime (213668417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 628267 + ... + 628606.

Almost surely, 2^213668410 is an apocalyptic number.

213668410 is a deficient number, since it is larger than the sum of its proper divisors (193558766).

213668410 is a wasteful number, since it uses less digits than its factorization.

213668410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256897.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 213668410 is about 14617.4009317662. The cubic root of 213668410 is about 597.8333055136.

The spelling of 213668410 in words is "two hundred thirteen million, six hundred sixty-eight thousand, four hundred ten".