200801521 has 2 divisors, whose sum is σ = 200801522. Its totient is φ = 200801520.

The previous prime is 200801483. The next prime is 200801527. The reversal of 200801521 is 125108002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185940496 + 14861025 = 13636^2 + 3855^2 .

It is a cyclic number.

It is not a de Polignac number, because 200801521 - 2¹⁵ = 200768753 is a prime.

It is equal to p_11120923 and since 200801521 and 11120923 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (200801527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100400760 + 100400761.

It is an arithmetic number, because the mean of its divisors is an integer number (100400761).

Almost surely, 2^200801521 is an apocalyptic number.

It is an amenable number.

200801521 is a deficient number, since it is larger than the sum of its proper divisors (1).

200801521 is an equidigital number, since it uses as much as digits as its factorization.

200801521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 200801521 is about 14170.4453352744. The cubic root of 200801521 is about 585.5837268927.

Adding to 200801521 its reverse (125108002), we get a palindrome (325909523).

The spelling of 200801521 in words is "two hundred million, eight hundred one thousand, five hundred twenty-one".