642331253227 has 4 divisors (see below), whose sum is σ = 642387763080. Its totient is φ = 642274743376.

The previous prime is 642331253183. The next prime is 642331253231. The reversal of 642331253227 is 722352133246.

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 642331253227 - 2¹¹ = 642331251179 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 642331253227.

It is not an unprimeable number, because it can be changed into a prime (642331253027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28237873 + ... + 28260610.

It is an arithmetic number, because the mean of its divisors is an integer number (160596940770).

Almost surely, 2^642331253227 is an apocalyptic number.

642331253227 is a deficient number, since it is larger than the sum of its proper divisors (56509853).

642331253227 is a wasteful number, since it uses less digits than its factorization.

642331253227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56509852.

The product of its digits is 362880, while the sum is 40.

The spelling of 642331253227 in words is "six hundred forty-two billion, three hundred thirty-one million, two hundred fifty-three thousand, two hundred twenty-seven".