610221643 has 4 divisors (see below), whose sum is σ = 624412888. Its totient is φ = 596030400.

The previous prime is 610221637. The next prime is 610221679. The reversal of 610221643 is 346122016.

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

It is a cyclic number.

It is not a de Polignac number, because 610221643 - 2²⁵ = 576667211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (610222643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7095558 + ... + 7095643.

It is an arithmetic number, because the mean of its divisors is an integer number (156103222).

Almost surely, 2^610221643 is an apocalyptic number.

610221643 is a deficient number, since it is larger than the sum of its proper divisors (14191245).

610221643 is a wasteful number, since it uses less digits than its factorization.

610221643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14191244.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 610221643 is about 24702.6646943199. The cubic root of 610221643 is about 848.1953143286.

Adding to 610221643 its reverse (346122016), we get a palindrome (956343659).

The spelling of 610221643 in words is "six hundred ten million, two hundred twenty-one thousand, six hundred forty-three".