55069 has 4 divisors (see below), whose sum is σ = 62944. Its totient is φ = 47196.
The previous prime is 55061. The next prime is 55073. The reversal of 55069 is 96055.
It is a happy number.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96055 = 5 ⋅19211.
It is a cyclic number.
It is not a de Polignac number, because 55069 - 23 = 55061 is a prime.
It is a super-2 number, since 2×550692 = 6065189522, which contains 22 as substring.
It is an Ulam number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (55061) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3927 + ... + 3940.
It is an arithmetic number, because the mean of its divisors is an integer number (15736).
255069 is an apocalyptic number.
It is an amenable number.
55069 is a deficient number, since it is larger than the sum of its proper divisors (7875).
55069 is an equidigital number, since it uses as much as digits as its factorization.
55069 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 7874.
The product of its (nonzero) digits is 1350, while the sum is 25.
The square root of 55069 is about 234.6678503758. The cubic root of 55069 is about 38.0454212175.
It can be divided in two parts, 550 and 69, that multiplied together give a triangular number (37950 = T275).
The spelling of 55069 in words is "fifty-five thousand, sixty-nine".
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