55601857 has 4 divisors (see below), whose sum is σ = 55646676. Its totient is φ = 55557040.

The previous prime is 55601851. The next prime is 55601869. The reversal of 55601857 is 75810655.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19793601 + 35808256 = 4449^2 + 5984^2 .

It is a cyclic number.

It is not a de Polignac number, because 55601857 - 2²³ = 47213249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55601851) 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 in 3 ways as a sum of consecutive naturals, for example, 20494 + ... + 23047.

It is an arithmetic number, because the mean of its divisors is an integer number (13911669).

Almost surely, 2^55601857 is an apocalyptic number.

It is an amenable number.

55601857 is a deficient number, since it is larger than the sum of its proper divisors (44819).

55601857 is a wasteful number, since it uses less digits than its factorization.

55601857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44818.

The product of its (nonzero) digits is 42000, while the sum is 37.

The square root of 55601857 is about 7456.6652734315. The cubic root of 55601857 is about 381.6773885951.

The spelling of 55601857 in words is "fifty-five million, six hundred one thousand, eight hundred fifty-seven".