55434406321 has 4 divisors (see below), whose sum is σ = 63353607232. Its totient is φ = 47515205412.

The previous prime is 55434406309. The next prime is 55434406369. The reversal of 55434406321 is 12360443455.

55434406321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 55434406321 - 2³¹ = 53286922673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55434406301) 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, 3959600445 + ... + 3959600458.

It is an arithmetic number, because the mean of its divisors is an integer number (15838401808).

Almost surely, 2^55434406321 is an apocalyptic number.

It is an amenable number.

55434406321 is a deficient number, since it is larger than the sum of its proper divisors (7919200911).

55434406321 is an equidigital number, since it uses as much as digits as its factorization.

55434406321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7919200910.

The product of its (nonzero) digits is 172800, while the sum is 37.

Adding to 55434406321 its reverse (12360443455), we get a palindrome (67794849776).

The spelling of 55434406321 in words is "fifty-five billion, four hundred thirty-four million, four hundred six thousand, three hundred twenty-one".