54407021 has 4 divisors (see below), whose sum is σ = 57607452. Its totient is φ = 51206592.

The previous prime is 54406999. The next prime is 54407047. The reversal of 54407021 is 12070445.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12070445 = 5 ⋅2414089.

It can be written as a sum of positive squares in 2 ways, for example, as 27678121 + 26728900 = 5261^2 + 5170^2 .

It is a cyclic number.

It is not a de Polignac number, because 54407021 - 2¹⁸ = 54144877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54407071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1600190 + ... + 1600223.

It is an arithmetic number, because the mean of its divisors is an integer number (14401863).

Almost surely, 2^54407021 is an apocalyptic number.

It is an amenable number.

54407021 is a deficient number, since it is larger than the sum of its proper divisors (3200431).

54407021 is a wasteful number, since it uses less digits than its factorization.

54407021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3200430.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 54407021 is about 7376.1115094608. Note that the first 3 decimals coincide. The cubic root of 54407021 is about 378.9235950807.

Adding to 54407021 its reverse (12070445), we get a palindrome (66477466).

The spelling of 54407021 in words is "fifty-four million, four hundred seven thousand, twenty-one".