221209600659 has 48 divisors (see below), whose sum is σ = 317297124480. Its totient is φ = 136690329600.

The previous prime is 221209600657. The next prime is 221209600673. The reversal of 221209600659 is 956006902122.

It is not a de Polignac number, because 221209600659 - 2¹ = 221209600657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221209600659.

It is not an unprimeable number, because it can be changed into a prime (221209600657) 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 47 ways as a sum of consecutive naturals, for example, 43792684 + ... + 43797734.

It is an arithmetic number, because the mean of its divisors is an integer number (6610356760).

Almost surely, 2^221209600659 is an apocalyptic number.

221209600659 is a deficient number, since it is larger than the sum of its proper divisors (96087523821).

221209600659 is an equidigital number, since it uses as much as digits as its factorization.

221209600659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5348 (or 5259 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The spelling of 221209600659 in words is "two hundred twenty-one billion, two hundred nine million, six hundred thousand, six hundred fifty-nine".