213023810 has 16 divisors (see below), whose sum is σ = 386019000. Its totient is φ = 84637056.

The previous prime is 213023809. The next prime is 213023813. The reversal of 213023810 is 18320312.

It can be written as a sum of positive squares in 4 ways, for example, as 63377521 + 149646289 = 7961^2 + 12233^2 .

It is a super-2 number, since 2×213023810² = 90758287253832200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213023813) 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 7 ways as a sum of consecutive naturals, for example, 69995 + ... + 72974.

Almost surely, 2^213023810 is an apocalyptic number.

213023810 is a deficient number, since it is larger than the sum of its proper divisors (172995190).

213023810 is a wasteful number, since it uses less digits than its factorization.

213023810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143125.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 213023810 is about 14595.3352136907. The cubic root of 213023810 is about 597.2315139744.

The spelling of 213023810 in words is "two hundred thirteen million, twenty-three thousand, eight hundred ten".