213023145 has 16 divisors (see below), whose sum is σ = 341811072. Its totient is φ = 113287680.

The previous prime is 213023143. The next prime is 213023149. The reversal of 213023145 is 541320312.

It is not a de Polignac number, because 213023145 - 2¹ = 213023143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213023143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14821 + ... + 25410.

It is an arithmetic number, because the mean of its divisors is an integer number (21363192).

Almost surely, 2^213023145 is an apocalyptic number.

It is an amenable number.

213023145 is a deficient number, since it is larger than the sum of its proper divisors (128787927).

213023145 is a wasteful number, since it uses less digits than its factorization.

213023145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40592.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 213023145 is about 14595.3124324216. The cubic root of 213023145 is about 597.2308925112.

Adding to 213023145 its reverse (541320312), we get a palindrome (754343457).

The spelling of 213023145 in words is "two hundred thirteen million, twenty-three thousand, one hundred forty-five".