642553203 has 8 divisors (see below), whose sum is σ = 886280400. Its totient is φ = 413597408.

The previous prime is 642553141. The next prime is 642553207. The reversal of 642553203 is 302355246.

642553203 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 642553203 - 2²² = 638358899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (642553207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3692748 + ... + 3692921.

It is an arithmetic number, because the mean of its divisors is an integer number (110785050).

Almost surely, 2^642553203 is an apocalyptic number.

642553203 is a deficient number, since it is larger than the sum of its proper divisors (243727197).

642553203 is a wasteful number, since it uses less digits than its factorization.

642553203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7385701.

The product of its (nonzero) digits is 21600, while the sum is 30.

The square root of 642553203 is about 25348.6331584170. The cubic root of 642553203 is about 862.9183365288.

The spelling of 642553203 in words is "six hundred forty-two million, five hundred fifty-three thousand, two hundred three".