221145304054 has 16 divisors (see below), whose sum is σ = 334090249920. Its totient is φ = 109783810440.

The previous prime is 221145304019. The next prime is 221145304067. The reversal of 221145304054 is 450403541122.

It is a super-2 number, since 2×221145304054² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250152 + ... + 710539.

It is an arithmetic number, because the mean of its divisors is an integer number (20880640620).

Almost surely, 2^221145304054 is an apocalyptic number.

221145304054 is a deficient number, since it is larger than the sum of its proper divisors (112944945866).

221145304054 is a wasteful number, since it uses less digits than its factorization.

221145304054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961515.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 221145304054 its reverse (450403541122), we get a palindrome (671548845176).

The spelling of 221145304054 in words is "two hundred twenty-one billion, one hundred forty-five million, three hundred four thousand, fifty-four".