54535221 has 16 divisors (see below), whose sum is σ = 87008320. Its totient is φ = 33559920.

The previous prime is 54535219. The next prime is 54535237. The reversal of 54535221 is 12253545.

It is a happy number.

It is not a de Polignac number, because 54535221 - 2¹ = 54535219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54535241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77335 + ... + 78036.

It is an arithmetic number, because the mean of its divisors is an integer number (5438020).

Almost surely, 2^54535221 is an apocalyptic number.

It is an amenable number.

54535221 is a deficient number, since it is larger than the sum of its proper divisors (32473099).

54535221 is a wasteful number, since it uses less digits than its factorization.

54535221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155393 (or 155387 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 54535221 is about 7384.7966119589. The cubic root of 54535221 is about 379.2209825555.

Adding to 54535221 its reverse (12253545), we get a palindrome (66788766).

It can be divided in two parts, 54535 and 221, that added together give a square (54756 = 234²).

The spelling of 54535221 in words is "fifty-four million, five hundred thirty-five thousand, two hundred twenty-one".