213043404 has 48 divisors (see below), whose sum is σ = 574979328. Its totient is φ = 60134208.

The previous prime is 213043399. The next prime is 213043423. The reversal of 213043404 is 404340312.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8307 + ... + 22250.

It is an arithmetic number, because the mean of its divisors is an integer number (11978736).

Almost surely, 2^213043404 is an apocalyptic number.

It is an amenable number.

213043404 is an abundant number, since it is smaller than the sum of its proper divisors (361935924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213043404 is a wasteful number, since it uses less digits than its factorization.

213043404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30654 (or 30652 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 213043404 is about 14596.0064401192. The cubic root of 213043404 is about 597.2498245966.

Adding to 213043404 its reverse (404340312), we get a palindrome (617383716).

The spelling of 213043404 in words is "two hundred thirteen million, forty-three thousand, four hundred four".