55861851 has 4 divisors (see below), whose sum is σ = 74482472. Its totient is φ = 37241232.

The previous prime is 55861837. The next prime is 55861867. The reversal of 55861851 is 15816855.

55861851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 55861851 - 2¹⁵ = 55829083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55861951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9310306 + ... + 9310311.

It is an arithmetic number, because the mean of its divisors is an integer number (18620618).

Almost surely, 2^55861851 is an apocalyptic number.

55861851 is a deficient number, since it is larger than the sum of its proper divisors (18620621).

55861851 is a wasteful number, since it uses less digits than its factorization.

55861851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18620620.

The product of its digits is 48000, while the sum is 39.

The square root of 55861851 is about 7474.0786054202. The cubic root of 55861851 is about 382.2713709102.

The spelling of 55861851 in words is "fifty-five million, eight hundred sixty-one thousand, eight hundred fifty-one".