55054040421 has 4 divisors (see below), whose sum is σ = 73405387232. Its totient is φ = 36702693612.

The previous prime is 55054040417. The next prime is 55054040477. The reversal of 55054040421 is 12404045055.

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 not a de Polignac number, because 55054040421 - 2² = 55054040417 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 (55054048421) 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, 9175673401 + ... + 9175673406.

It is an arithmetic number, because the mean of its divisors is an integer number (18351346808).

Almost surely, 2^55054040421 is an apocalyptic number.

It is an amenable number.

55054040421 is a deficient number, since it is larger than the sum of its proper divisors (18351346811).

55054040421 is a wasteful number, since it uses less digits than its factorization.

55054040421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18351346810.

The product of its (nonzero) digits is 16000, while the sum is 30.

Adding to 55054040421 its reverse (12404045055), we get a palindrome (67458085476).

The spelling of 55054040421 in words is "fifty-five billion, fifty-four million, forty thousand, four hundred twenty-one".