642223016 has 16 divisors (see below), whose sum is σ = 1233538740. Its totient is φ = 313279360.

The previous prime is 642223013. The next prime is 642223027. The reversal of 642223016 is 610322246.

It can be written as a sum of positive squares in 2 ways, for example, as 511212100 + 131010916 = 22610^2 + 11446^2 .

It is not an unprimeable number, because it can be changed into a prime (642223013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 978671 + ... + 979326.

Almost surely, 2^642223016 is an apocalyptic number.

It is an amenable number.

642223016 is a deficient number, since it is larger than the sum of its proper divisors (591315724).

642223016 is a wasteful number, since it uses less digits than its factorization.

642223016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1958044 (or 1958040 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 642223016 is about 25342.1194062375. The cubic root of 642223016 is about 862.7705027340.

It can be divided in two parts, 6422230 and 16, that added together give a palindrome (6422246).

The spelling of 642223016 in words is "six hundred forty-two million, two hundred twenty-three thousand, sixteen".