213442445 has 8 divisors (see below), whose sum is σ = 256556544. Its totient is φ = 170470224.

The previous prime is 213442441. The next prime is 213442451. The reversal of 213442445 is 544244312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213442445 - 2² = 213442441 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213442441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32129 + ... + 38198.

It is an arithmetic number, because the mean of its divisors is an integer number (32069568).

Almost surely, 2^213442445 is an apocalyptic number.

It is an amenable number.

213442445 is a deficient number, since it is larger than the sum of its proper divisors (43114099).

213442445 is an equidigital number, since it uses as much as digits as its factorization.

213442445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70939.

The product of its digits is 15360, while the sum is 29.

The square root of 213442445 is about 14609.6695718966. The cubic root of 213442445 is about 597.6224849995.

Adding to 213442445 its reverse (544244312), we get a palindrome (757686757).

The spelling of 213442445 in words is "two hundred thirteen million, four hundred forty-two thousand, four hundred forty-five".