221520072441 has 8 divisors (see below), whose sum is σ = 300366200160. Its totient is φ = 145176996512.

The previous prime is 221520072409. The next prime is 221520072451. The reversal of 221520072441 is 144270025122.

221520072441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 221520072441 - 2⁵ = 221520072409 is a prime.

It is a super-2 number, since 2×221520072441² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221520072399 and 221520072408.

It is not an unprimeable number, because it can be changed into a prime (221520072451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 625762740 + ... + 625763093.

It is an arithmetic number, because the mean of its divisors is an integer number (37545775020).

Almost surely, 2^221520072441 is an apocalyptic number.

It is an amenable number.

221520072441 is a deficient number, since it is larger than the sum of its proper divisors (78846127719).

221520072441 is a wasteful number, since it uses less digits than its factorization.

221520072441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251525895.

The product of its (nonzero) digits is 8960, while the sum is 30.

Adding to 221520072441 its reverse (144270025122), we get a palindrome (365790097563).

The spelling of 221520072441 in words is "two hundred twenty-one billion, five hundred twenty million, seventy-two thousand, four hundred forty-one".