55005583 has 2 divisors, whose sum is σ = 55005584.
Its totient is φ = 55005582.
The previous prime is 55005553. The next prime is 55005623. The reversal of 55005583 is 38550055.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 55005583 - 213 = 54997391 is a prime.
It is a super-2 number, since 2×550055832 = 6051228322339778, which contains 22 as substring.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (55005553) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27502791 + 27502792.
It is an arithmetic number, because the mean of its divisors is an integer number (27502792).
Almost surely, 255005583 is an apocalyptic number.
55005583 is a deficient number, since it is larger than the sum of its proper divisors (1).
55005583 is an equidigital number, since it uses as much as digits as its factorization.
55005583 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 15000, while the sum is 31.
The square root of 55005583 is about 7416.5748833272.
The cubic root of 55005583 is about 380.3081134490.
The spelling of 55005583 in words is "fifty-five million, five thousand, five hundred eighty-three".