55111605 has 16 divisors (see below), whose sum is σ = 89674560. Its totient is φ = 28894208.

The previous prime is 55111601. The next prime is 55111613. The reversal of 55111605 is 50611155.

It is a cyclic number.

It is not a de Polignac number, because 55111605 - 2² = 55111601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55111601) 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, 30252 + ... + 32021.

It is an arithmetic number, because the mean of its divisors is an integer number (5604660).

Almost surely, 2^55111605 is an apocalyptic number.

It is an amenable number.

55111605 is a deficient number, since it is larger than the sum of its proper divisors (34562955).

55111605 is a wasteful number, since it uses less digits than its factorization.

55111605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62340.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 55111605 is about 7423.7190814308. The cubic root of 55111605 is about 380.5523016832.

The spelling of 55111605 in words is "fifty-five million, one hundred eleven thousand, six hundred five".