55421140441 has 4 divisors (see below), whose sum is σ = 55453762000. Its totient is φ = 55388518884.

The previous prime is 55421140421. The next prime is 55421140517. The reversal of 55421140441 is 14404112455.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55421140441 - 2⁵ = 55421140409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55421140421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16308231 + ... + 16311628.

It is an arithmetic number, because the mean of its divisors is an integer number (13863440500).

Almost surely, 2^55421140441 is an apocalyptic number.

It is an amenable number.

55421140441 is a deficient number, since it is larger than the sum of its proper divisors (32621559).

55421140441 is a wasteful number, since it uses less digits than its factorization.

55421140441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32621558.

The product of its (nonzero) digits is 12800, while the sum is 31.

Adding to 55421140441 its reverse (14404112455), we get a palindrome (69825252896).

The spelling of 55421140441 in words is "fifty-five billion, four hundred twenty-one million, one hundred forty thousand, four hundred forty-one".