642022150 has 96 divisors (see below), whose sum is σ = 1529402112. Its totient is φ = 194659200.

The previous prime is 642022123. The next prime is 642022159. The reversal of 642022150 is 51220246.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642022159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 140197 + ... + 144703.

It is an arithmetic number, because the mean of its divisors is an integer number (15931272).

Almost surely, 2^642022150 is an apocalyptic number.

642022150 is an abundant number, since it is smaller than the sum of its proper divisors (887379962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642022150 is a wasteful number, since it uses less digits than its factorization.

642022150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4574 (or 4569 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 642022150 is about 25338.1560102546. The cubic root of 642022150 is about 862.6805447151.

Adding to 642022150 its reverse (51220246), we get a palindrome (693242396).

The spelling of 642022150 in words is "six hundred forty-two million, twenty-two thousand, one hundred fifty".