55055605 has 48 divisors (see below), whose sum is σ = 79116912. Its totient is φ = 36608000.

The previous prime is 55055603. The next prime is 55055617. The reversal of 55055605 is 50655055.

It can be written as a sum of positive squares in 8 ways, for example, as 11930116 + 43125489 = 3454^2 + 6567^2 .

It is not a de Polignac number, because 55055605 - 2¹ = 55055603 is a prime.

It is a super-2 number, since 2×55055605² = 6062239283832050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55055603) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 545055 + ... + 545155.

It is an arithmetic number, because the mean of its divisors is an integer number (1648269).

Almost surely, 2^55055605 is an apocalyptic number.

55055605 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55055605 is a deficient number, since it is larger than the sum of its proper divisors (24061307).

55055605 is a wasteful number, since it uses less digits than its factorization.

55055605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 31.

The square root of 55055605 is about 7419.9464283780. The cubic root of 55055605 is about 380.4233624086.

The spelling of 55055605 in words is "fifty-five million, fifty-five thousand, six hundred five".