642022202 has 4 divisors (see below), whose sum is σ = 963033306. Its totient is φ = 321011100.

The previous prime is 642022201. The next prime is 642022229. The reversal of 642022202 is 202220246.

642022202 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 557951641 + 84070561 = 23621^2 + 9169^2 .

It is not an unprimeable number, because it can be changed into a prime (642022201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160505549 + ... + 160505552.

Almost surely, 2^642022202 is an apocalyptic number.

642022202 is a deficient number, since it is larger than the sum of its proper divisors (321011104).

642022202 is a wasteful number, since it uses less digits than its factorization.

642022202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321011103.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 642022202 is about 25338.1570363750. The cubic root of 642022202 is about 862.6805680058.

Adding to 642022202 its reverse (202220246), we get a palindrome (844242448).

The spelling of 642022202 in words is "six hundred forty-two million, twenty-two thousand, two hundred two".