55342870421 has 4 divisors (see below), whose sum is σ = 55373911392. Its totient is φ = 55311829452.

The previous prime is 55342870403. The next prime is 55342870441. The reversal of 55342870421 is 12407824355.

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 55342870421 - 2²⁶ = 55275761557 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 (55342870441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15517811 + ... + 15521376.

It is an arithmetic number, because the mean of its divisors is an integer number (13843477848).

Almost surely, 2^55342870421 is an apocalyptic number.

It is an amenable number.

55342870421 is a deficient number, since it is larger than the sum of its proper divisors (31040971).

55342870421 is a wasteful number, since it uses less digits than its factorization.

55342870421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31040970.

The product of its (nonzero) digits is 268800, while the sum is 41.

The spelling of 55342870421 in words is "fifty-five billion, three hundred forty-two million, eight hundred seventy thousand, four hundred twenty-one".