213818408 has 16 divisors (see below), whose sum is σ = 413842560. Its totient is φ = 103460400.

The previous prime is 213818399. The next prime is 213818411. The reversal of 213818408 is 804818312.

213818408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 430838 + ... + 431333.

It is an arithmetic number, because the mean of its divisors is an integer number (25865160).

Almost surely, 2^213818408 is an apocalyptic number.

It is an amenable number.

213818408 is a deficient number, since it is larger than the sum of its proper divisors (200024152).

213818408 is a wasteful number, since it uses less digits than its factorization.

213818408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862208 (or 862204 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 213818408 is about 14622.5308342981. The cubic root of 213818408 is about 597.9731683729.

The spelling of 213818408 in words is "two hundred thirteen million, eight hundred eighteen thousand, four hundred eight".