54071721 has 12 divisors (see below), whose sum is σ = 85204080. Its totient is φ = 32770680.

The previous prime is 54071711. The next prime is 54071729. The reversal of 54071721 is 12717045.

It is not a de Polignac number, because 54071721 - 2⁷ = 54071593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54071729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 272991 + ... + 273188.

It is an arithmetic number, because the mean of its divisors is an integer number (7100340).

Almost surely, 2^54071721 is an apocalyptic number.

It is an amenable number.

54071721 is a deficient number, since it is larger than the sum of its proper divisors (31132359).

54071721 is a wasteful number, since it uses less digits than its factorization.

54071721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546196 (or 546193 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 54071721 is about 7353.3476050028. The cubic root of 54071721 is about 378.1435794527.

Adding to 54071721 its reverse (12717045), we get a palindrome (66788766).

The spelling of 54071721 in words is "fifty-four million, seventy-one thousand, seven hundred twenty-one".