55051001 has 4 divisors (see below), whose sum is σ = 55538292. Its totient is φ = 54563712.

The previous prime is 55050997. The next prime is 55051027. The reversal of 55051001 is 10015055.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10015055 = 5 ⋅2003011.

It can be written as a sum of positive squares in 2 ways, for example, as 20241001 + 34810000 = 4499^2 + 5900^2 .

It is a cyclic number.

It is not a de Polignac number, because 55051001 - 2² = 55050997 is a prime.

It is a super-2 number, since 2×55051001² = 6061225422204002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55051081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243476 + ... + 243701.

It is an arithmetic number, because the mean of its divisors is an integer number (13884573).

Almost surely, 2^55051001 is an apocalyptic number.

It is an amenable number.

55051001 is a deficient number, since it is larger than the sum of its proper divisors (487291).

55051001 is a wasteful number, since it uses less digits than its factorization.

55051001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487290.

The product of its (nonzero) digits is 125, while the sum is 17.

The square root of 55051001 is about 7419.6361770642. The cubic root of 55051001 is about 380.4127578692.

Adding to 55051001 its reverse (10015055), we get a palindrome (65066056).

The spelling of 55051001 in words is "fifty-five million, fifty-one thousand, one".