55447111421 has 32 divisors (see below), whose sum is σ = 61360104960. Its totient is φ = 49794312384.

The previous prime is 55447111403. The next prime is 55447111427. The reversal of 55447111421 is 12411174455.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55447111421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55447111427) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 20664746 + ... + 20667428.

It is an arithmetic number, because the mean of its divisors is an integer number (1917503280).

Almost surely, 2^55447111421 is an apocalyptic number.

It is an amenable number.

55447111421 is a deficient number, since it is larger than the sum of its proper divisors (5912993539).

55447111421 is a wasteful number, since it uses less digits than its factorization.

55447111421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3065.

The product of its digits is 22400, while the sum is 35.

Adding to 55447111421 its reverse (12411174455), we get a palindrome (67858285876).

The spelling of 55447111421 in words is "fifty-five billion, four hundred forty-seven million, one hundred eleven thousand, four hundred twenty-one".