55251542123 has 2 divisors, whose sum is σ = 55251542124. Its totient is φ = 55251542122.

The previous prime is 55251542113. The next prime is 55251542147. The reversal of 55251542123 is 32124515255.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55251542123 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (55251542113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27625771061 + 27625771062.

It is an arithmetic number, because the mean of its divisors is an integer number (27625771062).

Almost surely, 2^55251542123 is an apocalyptic number.

55251542123 is a deficient number, since it is larger than the sum of its proper divisors (1).

55251542123 is an equidigital number, since it uses as much as digits as its factorization.

55251542123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60000, while the sum is 35.

The spelling of 55251542123 in words is "fifty-five billion, two hundred fifty-one million, five hundred forty-two thousand, one hundred twenty-three".