54050021 has 4 divisors (see below), whose sum is σ = 57229452. Its totient is φ = 50870592.

The previous prime is 54049999. The next prime is 54050027. The reversal of 54050021 is 12005045.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50608996 + 3441025 = 7114^2 + 1855^2 .

It is a cyclic number.

It is not a de Polignac number, because 54050021 - 2²² = 49855717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 3179413 = 54050021 / (5 + 4 + 0 + 5 + 0 + 0 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54050027) 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, 1589690 + ... + 1589723.

It is an arithmetic number, because the mean of its divisors is an integer number (14307363).

Almost surely, 2^54050021 is an apocalyptic number.

It is an amenable number.

54050021 is a deficient number, since it is larger than the sum of its proper divisors (3179431).

54050021 is a wasteful number, since it uses less digits than its factorization.

54050021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3179430.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 54050021 is about 7351.8719384929. The cubic root of 54050021 is about 378.0929873042.

Adding to 54050021 its reverse (12005045), we get a palindrome (66055066).

The spelling of 54050021 in words is "fifty-four million, fifty thousand, twenty-one".