642536223 has 8 divisors (see below), whose sum is σ = 979102848. Its totient is φ = 367163544.

The previous prime is 642536221. The next prime is 642536261. The reversal of 642536223 is 322635246.

642536223 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 not a de Polignac number, because 642536223 - 2¹ = 642536221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642536221) 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, 15298461 + ... + 15298502.

It is an arithmetic number, because the mean of its divisors is an integer number (122387856).

Almost surely, 2^642536223 is an apocalyptic number.

642536223 is a deficient number, since it is larger than the sum of its proper divisors (336566625).

642536223 is a wasteful number, since it uses less digits than its factorization.

642536223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30596973.

The product of its digits is 51840, while the sum is 33.

The square root of 642536223 is about 25348.2982269027. The cubic root of 642536223 is about 862.9107353515.

The spelling of 642536223 in words is "six hundred forty-two million, five hundred thirty-six thousand, two hundred twenty-three".