55148857 has 2 divisors, whose sum is σ = 55148858. Its totient is φ = 55148856.

The previous prime is 55148851. The next prime is 55148869. The reversal of 55148857 is 75884155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54331641 + 817216 = 7371^2 + 904^2 .

It is a cyclic number.

It is not a de Polignac number, because 55148857 - 2⁷ = 55148729 is a prime.

It is not a weakly prime, because it can be changed into another prime (55148851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27574428 + 27574429.

It is an arithmetic number, because the mean of its divisors is an integer number (27574429).

Almost surely, 2^55148857 is an apocalyptic number.

It is an amenable number.

55148857 is a deficient number, since it is larger than the sum of its proper divisors (1).

55148857 is an equidigital number, since it uses as much as digits as its factorization.

55148857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 224000, while the sum is 43.

The square root of 55148857 is about 7426.2276426191. The cubic root of 55148857 is about 380.6380255608.

The spelling of 55148857 in words is "fifty-five million, one hundred forty-eight thousand, eight hundred fifty-seven".