213329444 has 12 divisors (see below), whose sum is σ = 379447068. Its totient is φ = 104916000.

The previous prime is 213329443. The next prime is 213329471. The reversal of 213329444 is 444923312.

It can be written as a sum of positive squares in 2 ways, for example, as 69089344 + 144240100 = 8312^2 + 12010^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 213329444.

It is not an unprimeable number, because it can be changed into a prime (213329443) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 436907 + ... + 437394.

It is an arithmetic number, because the mean of its divisors is an integer number (31620589).

Almost surely, 2^213329444 is an apocalyptic number.

It is an amenable number.

213329444 is a deficient number, since it is larger than the sum of its proper divisors (166117624).

213329444 is a wasteful number, since it uses less digits than its factorization.

213329444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874366 (or 874364 counting only the distinct ones).

The product of its digits is 20736, while the sum is 32.

The square root of 213329444 is about 14605.8017239726. The cubic root of 213329444 is about 597.5170016695.

The spelling of 213329444 in words is "two hundred thirteen million, three hundred twenty-nine thousand, four hundred forty-four".