221430556247375 has 32 divisors (see below), whose sum is σ = 278032419295488. Its totient is φ = 176064821184000.

The previous prime is 221430556247317. The next prime is 221430556247387. The reversal of 221430556247375 is 573742655034122.

It is not a de Polignac number, because 221430556247375 - 2²² = 221430552053071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221430556247375.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19456730 + ... + 28660520.

It is an arithmetic number, because the mean of its divisors is an integer number (8688513102984).

Almost surely, 2^{221430556247375} is an apocalyptic number.

221430556247375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

221430556247375 is a deficient number, since it is larger than the sum of its proper divisors (56601863048113).

221430556247375 is an equidigital number, since it uses as much as digits as its factorization.

221430556247375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9204980 (or 9204970 counting only the distinct ones).

The product of its (nonzero) digits is 42336000, while the sum is 56.

The spelling of 221430556247375 in words is "two hundred twenty-one trillion, four hundred thirty billion, five hundred fifty-six million, two hundred forty-seven thousand, three hundred seventy-five".