213165445 has 16 divisors (see below), whose sum is σ = 262310400. Its totient is φ = 166221184.

The previous prime is 213165443. The next prime is 213165451. The reversal of 213165445 is 544561312.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 213165445 - 2¹ = 213165443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213165443) 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 15 ways as a sum of consecutive naturals, for example, 60081 + ... + 63529.

It is an arithmetic number, because the mean of its divisors is an integer number (16394400).

Almost surely, 2^213165445 is an apocalyptic number.

It is an amenable number.

213165445 is a deficient number, since it is larger than the sum of its proper divisors (49144955).

213165445 is a wasteful number, since it uses less digits than its factorization.

213165445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3764.

The product of its digits is 14400, while the sum is 31.

The square root of 213165445 is about 14600.1864714119. The cubic root of 213165445 is about 597.3638468269.

It can be divided in two parts, 2131 and 65445, that added together give a palindrome (67576).

The spelling of 213165445 in words is "two hundred thirteen million, one hundred sixty-five thousand, four hundred forty-five".