55001 has 2 divisors, whose sum is σ = 55002.
Its totient is φ = 55000.
The previous prime is 54983. The next prime is 55009. The reversal of 55001 is 10055.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 30976 + 24025 = 176^2 + 155^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-55001 is a prime.
It is a super-2 number, since 2×550012 = 6050220002, which contains 22 as substring.
It is a Chen prime.
It is a plaindrome in base 15.
It is not a weakly prime, because it can be changed into another prime (55009) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27500 + 27501.
It is an arithmetic number, because the mean of its divisors is an integer number (27501).
255001 is an apocalyptic number.
It is an amenable number.
55001 is a deficient number, since it is larger than the sum of its proper divisors (1).
55001 is an equidigital number, since it uses as much as digits as its factorization.
55001 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 25, while the sum is 11.
The square root of 55001 is about 234.5229199886.
The cubic root of 55001 is about 38.0297550882.
Adding to 55001 its reverse (10055), we get a palindrome (65056).
The spelling of 55001 in words is "fifty-five thousand, one".