200642621 has 4 divisors (see below), whose sum is σ = 200857692. Its totient is φ = 200427552.

The previous prime is 200642599. The next prime is 200642627. The reversal of 200642621 is 126246002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64080025 + 136562596 = 8005^2 + 11686^2 .

It is a cyclic number.

It is not a de Polignac number, because 200642621 - 2⁶ = 200642557 is a prime.

It is a super-2 number, since 2×200642621² = 80514922723499282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200642627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106130 + ... + 108003.

It is an arithmetic number, because the mean of its divisors is an integer number (50214423).

Almost surely, 2^200642621 is an apocalyptic number.

It is an amenable number.

200642621 is a deficient number, since it is larger than the sum of its proper divisors (215071).

200642621 is an equidigital number, since it uses as much as digits as its factorization.

200642621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215070.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 200642621 is about 14164.8374858309. The cubic root of 200642621 is about 585.4292230677.

Adding to 200642621 its reverse (126246002), we get a palindrome (326888623).

The spelling of 200642621 in words is "two hundred million, six hundred forty-two thousand, six hundred twenty-one".