55540001 has 8 divisors (see below), whose sum is σ = 61190208.
Its totient is φ = 49990000.
The previous prime is 55539973. The next prime is 55540007. The reversal of 55540001 is 10004555.
Adding to 55540001 its reverse (10004555), we get a palindrome (65544556).
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 55540001 - 214 = 55523617 is a prime.
It is a super-2 number, since 2×555400012 = 6169383422160002, which contains 22 as substring.
It is a Duffinian number.
It is a Curzon number.
It is not an unprimeable number, because it can be changed into a prime (55540007) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23885 + ... + 26106.
It is an arithmetic number, because the mean of its divisors is an integer number (7648776).
Almost surely, 255540001 is an apocalyptic number.
It is an amenable number.
55540001 is a deficient number, since it is larger than the sum of its proper divisors (5650207).
55540001 is a wasteful number, since it uses less digits than its factorization.
55540001 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 50103.
The product of its (nonzero) digits is 500, while the sum is 20.
The square root of 55540001 is about 7452.5164206461.
The cubic root of 55540001 is about 381.5357998179.
The spelling of 55540001 in words is "fifty-five million, five hundred forty thousand, one".