54033721 has 6 divisors (see below), whose sum is σ = 62855610. Its totient is φ = 46314576.

The previous prime is 54033719. The next prime is 54033731. The reversal of 54033721 is 12733045.

It can be written as a sum of positive squares in only one way, i.e., 37945600 + 16088121 = 6160^2 + 4011^2 .

It is not a de Polignac number, because 54033721 - 2¹ = 54033719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54033731) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 551316 + ... + 551413.

It is an arithmetic number, because the mean of its divisors is an integer number (10475935).

Almost surely, 2^54033721 is an apocalyptic number.

It is an amenable number.

54033721 is a deficient number, since it is larger than the sum of its proper divisors (8821889).

54033721 is a wasteful number, since it uses less digits than its factorization.

54033721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102743 (or 1102736 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 54033721 is about 7350.7632936995. The cubic root of 54033721 is about 378.0549760003.

Adding to 54033721 its reverse (12733045), we get a palindrome (66766766).

The spelling of 54033721 in words is "fifty-four million, thirty-three thousand, seven hundred twenty-one".