55993861 has 16 divisors (see below), whose sum is σ = 70132608. Its totient is φ = 43430400.

The previous prime is 55993853. The next prime is 55993877. The reversal of 55993861 is 16839955.

It is a cyclic number.

It is not a de Polignac number, because 55993861 - 2³ = 55993853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55993261) 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, 16381 + ... + 19501.

It is an arithmetic number, because the mean of its divisors is an integer number (4383288).

Almost surely, 2^55993861 is an apocalyptic number.

It is an amenable number.

55993861 is a deficient number, since it is larger than the sum of its proper divisors (14138747).

55993861 is a wasteful number, since it uses less digits than its factorization.

55993861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3372.

The product of its digits is 291600, while the sum is 46.

The square root of 55993861 is about 7482.9045831148. The cubic root of 55993861 is about 382.5722557049.

The spelling of 55993861 in words is "fifty-five million, nine hundred ninety-three thousand, eight hundred sixty-one".