200669057521 has 3 divisors (see below), whose sum is σ = 200669505483. Its totient is φ = 200668609560.

The previous prime is 200669057509. The next prime is 200669057539. The reversal of 200669057521 is 125750966002.

The square root of 200669057521 is 447961.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 199952959921 + 716097600 = 447161^2 + 26760^2 .

It is not a de Polignac number, because 200669057521 - 2⁵ = 200669057489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200669057551) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 223981 + ... + 671941.

It is an arithmetic number, because the mean of its divisors is an integer number (66889835161).

Almost surely, 2^200669057521 is an apocalyptic number.

200669057521 is the 447961-st square number.

200669057521 is the 223981-st centered octagonal number.

It is an amenable number.

200669057521 is a deficient number, since it is larger than the sum of its proper divisors (447962).

200669057521 is an frugal number, since it uses more digits than its factorization.

200669057521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895922 (or 447961 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 200669057521 in words is "two hundred billion, six hundred sixty-nine million, fifty-seven thousand, five hundred twenty-one".