213665572 has 24 divisors (see below), whose sum is σ = 386499456. Its totient is φ = 103292448.

The previous prime is 213665567. The next prime is 213665579. The reversal of 213665572 is 275566312.

It is a zygodrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (213665579) 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, 8758 + ... + 22450.

It is an arithmetic number, because the mean of its divisors is an integer number (16104144).

Almost surely, 2^213665572 is an apocalyptic number.

It is an amenable number.

213665572 is a deficient number, since it is larger than the sum of its proper divisors (172833884).

213665572 is a wasteful number, since it uses less digits than its factorization.

213665572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13827 (or 13825 counting only the distinct ones).

The product of its digits is 75600, while the sum is 37.

The square root of 213665572 is about 14617.3038553627. The cubic root of 213665572 is about 597.8306586422.

The spelling of 213665572 in words is "two hundred thirteen million, six hundred sixty-five thousand, five hundred seventy-two".