54280521 has 18 divisors (see below), whose sum is σ = 79345422. Its totient is φ = 35758080.

The previous prime is 54280493. The next prime is 54280543. The reversal of 54280521 is 12508245.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 16088121 + 38192400 = 4011^2 + 6180^2 .

It is not a de Polignac number, because 54280521 - 2⁷ = 54280393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54280561) 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 17 ways as a sum of consecutive naturals, for example, 84361 + ... + 85001.

It is an arithmetic number, because the mean of its divisors is an integer number (4408079).

Almost surely, 2^54280521 is an apocalyptic number.

It is an amenable number.

54280521 is a deficient number, since it is larger than the sum of its proper divisors (25064901).

54280521 is an equidigital number, since it uses as much as digits as its factorization.

54280521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841 (or 741 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 54280521 is about 7367.5315404822. The cubic root of 54280521 is about 378.6296928615.

Adding to 54280521 its reverse (12508245), we get a palindrome (66788766).

The spelling of 54280521 in words is "fifty-four million, two hundred eighty thousand, five hundred twenty-one".