221534403655147 has 8 divisors (see below), whose sum is σ = 241720469230320. Its totient is φ = 201356100468960.

The previous prime is 221534403655141. The next prime is 221534403655153. The reversal of 221534403655147 is 741556304435122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (221534403655141) and next prime (221534403655153).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221534403655147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221534403655094 and 221534403655103.

It is not an unprimeable number, because it can be changed into a prime (221534403655141) 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, 1940537568 + ... + 1940651725.

It is an arithmetic number, because the mean of its divisors is an integer number (30215058653790).

Almost surely, 2^{221534403655147} is an apocalyptic number.

221534403655147 is a deficient number, since it is larger than the sum of its proper divisors (20186065575173).

221534403655147 is a wasteful number, since it uses less digits than its factorization.

221534403655147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3881194493.

The product of its (nonzero) digits is 12096000, while the sum is 52.

The spelling of 221534403655147 in words is "two hundred twenty-one trillion, five hundred thirty-four billion, four hundred three million, six hundred fifty-five thousand, one hundred forty-seven".