54221121643 has 16 divisors (see below), whose sum is σ = 60308750880. Its totient is φ = 48433192704.

The previous prime is 54221121641. The next prime is 54221121649. The reversal of 54221121643 is 34612112245.

It is not a de Polignac number, because 54221121643 - 2¹ = 54221121641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54221121641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 488713 + ... + 589306.

It is an arithmetic number, because the mean of its divisors is an integer number (3769296930).

Almost surely, 2^54221121643 is an apocalyptic number.

54221121643 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

54221121643 is a deficient number, since it is larger than the sum of its proper divisors (6087629237).

54221121643 is a wasteful number, since it uses less digits than its factorization.

54221121643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078158.

The product of its digits is 11520, while the sum is 31.

Adding to 54221121643 its reverse (34612112245), we get a palindrome (88833233888).

The spelling of 54221121643 in words is "fifty-four billion, two hundred twenty-one million, one hundred twenty-one thousand, six hundred forty-three".