213533668 has 24 divisors (see below), whose sum is σ = 398702304. Its totient is φ = 99715200.

The previous prime is 213533629. The next prime is 213533669. The reversal of 213533668 is 866335312.

It is a happy number.

213533668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (213533669) 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, 3078 + ... + 20893.

It is an arithmetic number, because the mean of its divisors is an integer number (16612596).

Almost surely, 2^213533668 is an apocalyptic number.

It is an amenable number.

213533668 is a deficient number, since it is larger than the sum of its proper divisors (185168636).

213533668 is a wasteful number, since it uses less digits than its factorization.

213533668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24123 (or 24121 counting only the distinct ones).

The product of its digits is 77760, while the sum is 37.

The square root of 213533668 is about 14612.7912460283. The cubic root of 213533668 is about 597.7076120090.

The spelling of 213533668 in words is "two hundred thirteen million, five hundred thirty-three thousand, six hundred sixty-eight".