221982652635 has 16 divisors (see below), whose sum is σ = 358833816096. Its totient is φ = 117170224128.

The previous prime is 221982652601. The next prime is 221982652637. The reversal of 221982652635 is 536256289122.

It is a happy number.

It is not a de Polignac number, because 221982652635 - 2⁹ = 221982652123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221982652637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76281244 + ... + 76284153.

It is an arithmetic number, because the mean of its divisors is an integer number (22427113506).

Almost surely, 2^221982652635 is an apocalyptic number.

221982652635 is a deficient number, since it is larger than the sum of its proper divisors (136851163461).

221982652635 is a wasteful number, since it uses less digits than its factorization.

221982652635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152565502.

The product of its digits is 3110400, while the sum is 51.

The spelling of 221982652635 in words is "two hundred twenty-one billion, nine hundred eighty-two million, six hundred fifty-two thousand, six hundred thirty-five".