55505601 has 16 divisors (see below), whose sum is σ = 85806720. Its totient is φ = 35394480.

The previous prime is 55505591. The next prime is 55505609. The reversal of 55505601 is 10650555.

55505601 is a `hidden beast` number, since 5 + 5 + 50 + 5 + 601 = 666.

It is not a de Polignac number, because 55505601 - 2¹⁰ = 55504577 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55505609) 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, 44070 + ... + 45311.

It is an arithmetic number, because the mean of its divisors is an integer number (5362920).

Almost surely, 2^55505601 is an apocalyptic number.

It is an amenable number.

55505601 is a deficient number, since it is larger than the sum of its proper divisors (30301119).

55505601 is a wasteful number, since it uses less digits than its factorization.

55505601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89413 (or 89407 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The square root of 55505601 is about 7450.2081178985. The cubic root of 55505601 is about 381.4570125058.

The spelling of 55505601 in words is "fifty-five million, five hundred five thousand, six hundred one".