55011001 has 4 divisors (see below), whose sum is σ = 55044900. Its totient is φ = 54977104.

The previous prime is 55010993. The next prime is 55011017. The reversal of 55011001 is 10011055.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10011055 = 5 ⋅2002211.

It can be written as a sum of positive squares in 2 ways, for example, as 13395600 + 41615401 = 3660^2 + 6451^2 .

It is a cyclic number.

It is not a de Polignac number, because 55011001 - 2³ = 55010993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55011041) 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, 14386 + ... + 17803.

It is an arithmetic number, because the mean of its divisors is an integer number (13761225).

Almost surely, 2^55011001 is an apocalyptic number.

It is an amenable number.

55011001 is a deficient number, since it is larger than the sum of its proper divisors (33899).

55011001 is a wasteful number, since it uses less digits than its factorization.

55011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33898.

The product of its (nonzero) digits is 25, while the sum is 13.

The square root of 55011001 is about 7416.9401372803. The cubic root of 55011001 is about 380.3205997070.

Adding to 55011001 its reverse (10011055), we get a palindrome (65022056).

The spelling of 55011001 in words is "fifty-five million, eleven thousand, one".