142221605650 has 24 divisors (see below), whose sum is σ = 270984194964. Its totient is φ = 55501113600.

The previous prime is 142221605621. The next prime is 142221605653. The reversal of 142221605650 is 56506122241.

It can be written as a sum of positive squares in 6 ways, for example, as 46607929 + 142174997721 = 6827^2 + 377061^2 .

It is a super-2 number, since 2×142221605650² (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 polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34686147 + ... + 34690246.

Almost surely, 2^142221605650 is an apocalyptic number.

142221605650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142221605650 is a deficient number, since it is larger than the sum of its proper divisors (128762589314).

142221605650 is a wasteful number, since it uses less digits than its factorization.

142221605650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69376446 (or 69376441 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

Adding to 142221605650 its reverse (56506122241), we get a palindrome (198727727891).

The spelling of 142221605650 in words is "one hundred forty-two billion, two hundred twenty-one million, six hundred five thousand, six hundred fifty".