55442000231 has 2 divisors, whose sum is σ = 55442000232. Its totient is φ = 55442000230.

The previous prime is 55442000149. The next prime is 55442000233. The reversal of 55442000231 is 13200024455.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55442000231 is a prime.

It is a super-2 number, since 2×55442000231² (a number of 22 digits) contains 22 as substring.

Together with 55442000233, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55442000231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55442000233) 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 as a sum of consecutive naturals, namely, 27721000115 + 27721000116.

It is an arithmetic number, because the mean of its divisors is an integer number (27721000116).

Almost surely, 2^55442000231 is an apocalyptic number.

55442000231 is a deficient number, since it is larger than the sum of its proper divisors (1).

55442000231 is an equidigital number, since it uses as much as digits as its factorization.

55442000231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 55442000231 its reverse (13200024455), we get a palindrome (68642024686).

The spelling of 55442000231 in words is "fifty-five billion, four hundred forty-two million, two hundred thirty-one", and thus it is an aban number.