142221605651 has 16 divisors (see below), whose sum is σ = 153574120800. Its totient is φ = 131213795328.

The previous prime is 142221605621. The next prime is 142221605653. The reversal of 142221605651 is 156506122241.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142221605651 is a prime.

It is a super-2 number, since 2×142221605651² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (142221605653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153215 + ... + 554903.

It is an arithmetic number, because the mean of its divisors is an integer number (9598382550).

Almost surely, 2^142221605651 is an apocalyptic number.

142221605651 is a deficient number, since it is larger than the sum of its proper divisors (11352515149).

142221605651 is a wasteful number, since it uses less digits than its factorization.

142221605651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402118.

The product of its (nonzero) digits is 28800, while the sum is 35.

Adding to 142221605651 its reverse (156506122241), we get a palindrome (298727727892).

The spelling of 142221605651 in words is "one hundred forty-two billion, two hundred twenty-one million, six hundred five thousand, six hundred fifty-one".