213421044 has 24 divisors (see below), whose sum is σ = 501328800. Its totient is φ = 70662304.

The previous prime is 213421037. The next prime is 213421067. The reversal of 213421044 is 440124312.

It is a self number, because there is not a number n which added to its sum of digits gives 213421044.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57894 + ... + 61469.

It is an arithmetic number, because the mean of its divisors is an integer number (20888700).

Almost surely, 2^213421044 is an apocalyptic number.

It is an amenable number.

213421044 is an abundant number, since it is smaller than the sum of its proper divisors (287907756).

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

213421044 is a wasteful number, since it uses less digits than its factorization.

213421044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119519 (or 119517 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 213421044 is about 14608.9371276626. The cubic root of 213421044 is about 597.6025106120.

Adding to 213421044 its reverse (440124312), we get a palindrome (653545356).

The spelling of 213421044 in words is "two hundred thirteen million, four hundred twenty-one thousand, forty-four".