55850857 has 2 divisors, whose sum is σ = 55850858. Its totient is φ = 55850856.

The previous prime is 55850843. The next prime is 55850869. The reversal of 55850857 is 75805855.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50851161 + 4999696 = 7131^2 + 2236^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55850857 is a prime.

It is not a weakly prime, because it can be changed into another prime (55850887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27925428 + 27925429.

It is an arithmetic number, because the mean of its divisors is an integer number (27925429).

Almost surely, 2^55850857 is an apocalyptic number.

It is an amenable number.

55850857 is a deficient number, since it is larger than the sum of its proper divisors (1).

55850857 is an equidigital number, since it uses as much as digits as its factorization.

55850857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280000, while the sum is 43.

The square root of 55850857 is about 7473.3430939573. The cubic root of 55850857 is about 382.2462913785.

It can be divided in two parts, 558 and 50857, that added together give a palindrome (51415).

The spelling of 55850857 in words is "fifty-five million, eight hundred fifty thousand, eight hundred fifty-seven".