642222353 has 8 divisors (see below), whose sum is σ = 677056128. Its totient is φ = 607964544.

The previous prime is 642222341. The next prime is 642222367. The reversal of 642222353 is 353222246.

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 642222353 - 2¹² = 642218257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642422353) 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, 141701 + ... + 146162.

It is an arithmetic number, because the mean of its divisors is an integer number (84632016).

Almost surely, 2^642222353 is an apocalyptic number.

It is an amenable number.

642222353 is a deficient number, since it is larger than the sum of its proper divisors (34833775).

642222353 is a wasteful number, since it uses less digits than its factorization.

642222353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287983.

The product of its digits is 17280, while the sum is 29.

The square root of 642222353 is about 25342.1063252446. The cubic root of 642222353 is about 862.7702058397.

Adding to 642222353 its reverse (353222246), we get a palindrome (995444599).

The spelling of 642222353 in words is "six hundred forty-two million, two hundred twenty-two thousand, three hundred fifty-three".