55042901 has 4 divisors (see below), whose sum is σ = 55444812. Its totient is φ = 54640992.

The previous prime is 55042877. The next prime is 55042907. The reversal of 55042901 is 10924055.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10924055 = 5 ⋅2184811.

It can be written as a sum of positive squares in 2 ways, for example, as 15792676 + 39250225 = 3974^2 + 6265^2 .

It is a cyclic number.

It is not a de Polignac number, because 55042901 - 2²² = 50848597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55042907) 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, 200750 + ... + 201023.

It is an arithmetic number, because the mean of its divisors is an integer number (13861203).

Almost surely, 2^55042901 is an apocalyptic number.

It is an amenable number.

55042901 is a deficient number, since it is larger than the sum of its proper divisors (401911).

55042901 is a wasteful number, since it uses less digits than its factorization.

55042901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401910.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 55042901 is about 7419.0903081173. The cubic root of 55042901 is about 380.3940994469.

Adding to 55042901 its reverse (10924055), we get a palindrome (65966956).

The spelling of 55042901 in words is "fifty-five million, forty-two thousand, nine hundred one".