221534403655137 has 8 divisors (see below), whose sum is σ = 295379280602304. Its totient is φ = 147689564572368.

The previous prime is 221534403655129. The next prime is 221534403655141. The reversal of 221534403655137 is 731556304435122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221534403655137 - 2³ = 221534403655129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221534403655137.

It is not an unprimeable number, because it can be changed into a prime (221534403653137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9769668 + ... + 23205930.

It is an arithmetic number, because the mean of its divisors is an integer number (36922410075288).

Almost surely, 2^{221534403655137} is an apocalyptic number.

It is an amenable number.

221534403655137 is a deficient number, since it is larger than the sum of its proper divisors (73844876947167).

221534403655137 is a wasteful number, since it uses less digits than its factorization.

221534403655137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18932199.

The product of its (nonzero) digits is 9072000, while the sum is 51.

The spelling of 221534403655137 in words is "two hundred twenty-one trillion, five hundred thirty-four billion, four hundred three million, six hundred fifty-five thousand, one hundred thirty-seven".