642302215101 has 12 divisors (see below), whose sum is σ = 930696589212. Its totient is φ = 426850681536.

The previous prime is 642302215033. The next prime is 642302215109. The reversal of 642302215101 is 101512203246.

642302215101 is a `hidden beast` number, since 6 + 42 + 302 + 215 + 101 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16059479076 + 626242736025 = 126726^2 + 791355^2 .

It is not a de Polignac number, because 642302215101 - 2¹⁴ = 642302198717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642302215109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112563256 + ... + 112568961.

It is an arithmetic number, because the mean of its divisors is an integer number (77558049101).

Almost surely, 2^642302215101 is an apocalyptic number.

It is an amenable number.

642302215101 is a deficient number, since it is larger than the sum of its proper divisors (288394374111).

642302215101 is a wasteful number, since it uses less digits than its factorization.

642302215101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225132540 (or 225132537 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 642302215101 its reverse (101512203246), we get a palindrome (743814418347).

The spelling of 642302215101 in words is "six hundred forty-two billion, three hundred two million, two hundred fifteen thousand, one hundred one".