642216102 has 16 divisors (see below), whose sum is σ = 1401198912. Its totient is φ = 194610920.

The previous prime is 642216061. The next prime is 642216151. The reversal of 642216102 is 201612246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4865208 + ... + 4865339.

It is an arithmetic number, because the mean of its divisors is an integer number (87574932).

Almost surely, 2^642216102 is an apocalyptic number.

642216102 is an abundant number, since it is smaller than the sum of its proper divisors (758982810).

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

642216102 is a wasteful number, since it uses less digits than its factorization.

642216102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9730563.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 642216102 is about 25341.9829926547. The cubic root of 642216102 is about 862.7674066046.

Adding to 642216102 its reverse (201612246), we get a palindrome (843828348).

The spelling of 642216102 in words is "six hundred forty-two million, two hundred sixteen thousand, one hundred two".