200957621 has 4 divisors (see below), whose sum is σ = 201046092. Its totient is φ = 200869152.

The previous prime is 200957597. The next prime is 200957633. The reversal of 200957621 is 126759002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126759002 = 2 ⋅63379501.

It can be written as a sum of positive squares in 2 ways, for example, as 21022225 + 179935396 = 4585^2 + 13414^2 .

It is a cyclic number.

It is not a de Polignac number, because 200957621 - 2⁶ = 200957557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200957681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40736 + ... + 45401.

It is an arithmetic number, because the mean of its divisors is an integer number (50261523).

Almost surely, 2^200957621 is an apocalyptic number.

It is an amenable number.

200957621 is a deficient number, since it is larger than the sum of its proper divisors (88471).

200957621 is an equidigital number, since it uses as much as digits as its factorization.

200957621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88470.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 200957621 is about 14175.9522078765. The cubic root of 200957621 is about 585.7354288365.

The spelling of 200957621 in words is "two hundred million, nine hundred fifty-seven thousand, six hundred twenty-one".