55540431443 has 4 divisors (see below), whose sum is σ = 63474778800. Its totient is φ = 47606084088.

The previous prime is 55540431437. The next prime is 55540431449. The reversal of 55540431443 is 34413404555.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (55540431437) and next prime (55540431449).

It is a cyclic number.

It is not a de Polignac number, because 55540431443 - 2⁶ = 55540431379 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55540431397 and 55540431406.

It is not an unprimeable number, because it can be changed into a prime (55540431449) 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 3 ways as a sum of consecutive naturals, for example, 3967173668 + ... + 3967173681.

It is an arithmetic number, because the mean of its divisors is an integer number (15868694700).

Almost surely, 2^55540431443 is an apocalyptic number.

55540431443 is a deficient number, since it is larger than the sum of its proper divisors (7934347357).

55540431443 is an equidigital number, since it uses as much as digits as its factorization.

55540431443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7934347356.

The product of its (nonzero) digits is 288000, while the sum is 38.

Adding to 55540431443 its reverse (34413404555), we get a palindrome (89953835998).

The spelling of 55540431443 in words is "fifty-five billion, five hundred forty million, four hundred thirty-one thousand, four hundred forty-three".