213513445 has 8 divisors (see below), whose sum is σ = 262465560. Its totient is φ = 166644480.

The previous prime is 213513407. The next prime is 213513491. The reversal of 213513445 is 544315312.

It can be written as a sum of positive squares in 4 ways, for example, as 148996 + 213364449 = 386^2 + 14607^2 .

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

It is not a de Polignac number, because 213513445 - 2¹⁵ = 213480677 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 520560 + ... + 520969.

It is an arithmetic number, because the mean of its divisors is an integer number (32808195).

Almost surely, 2^213513445 is an apocalyptic number.

It is an amenable number.

213513445 is a deficient number, since it is larger than the sum of its proper divisors (48952115).

213513445 is a wasteful number, since it uses less digits than its factorization.

213513445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041575.

The product of its digits is 7200, while the sum is 28.

The square root of 213513445 is about 14612.0992673880. The cubic root of 213513445 is about 597.6887425059.

Adding to 213513445 its reverse (544315312), we get a palindrome (757828757).

The spelling of 213513445 in words is "two hundred thirteen million, five hundred thirteen thousand, four hundred forty-five".