55809105 has 16 divisors (see below), whose sum is σ = 97412544. Its totient is φ = 27058880.

The previous prime is 55809101. The next prime is 55809107. The reversal of 55809105 is 50190855.

It is not a de Polignac number, because 55809105 - 2² = 55809101 is a prime.

It is a super-2 number, since 2×55809105² = 6229312401802050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (55809101) 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, 168954 + ... + 169283.

It is an arithmetic number, because the mean of its divisors is an integer number (6088284).

Almost surely, 2^55809105 is an apocalyptic number.

55809105 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55809105 is a deficient number, since it is larger than the sum of its proper divisors (41603439).

55809105 is a wasteful number, since it uses less digits than its factorization.

55809105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338256.

The product of its (nonzero) digits is 9000, while the sum is 33.

The square root of 55809105 is about 7470.5491766001. The cubic root of 55809105 is about 382.1510166499.

The spelling of 55809105 in words is "fifty-five million, eight hundred nine thousand, one hundred five".