55500861 has 16 divisors (see below), whose sum is σ = 80236800. Its totient is φ = 33921600.

The previous prime is 55500859. The next prime is 55500877. The reversal of 55500861 is 16800555.

It is a happy number.

It is not a de Polignac number, because 55500861 - 2¹ = 55500859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55500821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1036 + ... + 10586.

It is an arithmetic number, because the mean of its divisors is an integer number (5014800).

Almost surely, 2^55500861 is an apocalyptic number.

It is an amenable number.

55500861 is a deficient number, since it is larger than the sum of its proper divisors (24735939).

55500861 is a wasteful number, since it uses less digits than its factorization.

55500861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9716.

The product of its (nonzero) digits is 6000, while the sum is 30.

The square root of 55500861 is about 7449.8899991879. The cubic root of 55500861 is about 381.4461537956.

The spelling of 55500861 in words is "fifty-five million, five hundred thousand, eight hundred sixty-one".