54112721 has 16 divisors (see below), whose sum is σ = 61689600. Its totient is φ = 47087040.

The previous prime is 54112699. The next prime is 54112727. The reversal of 54112721 is 12721145.

It is not a de Polignac number, because 54112721 - 2⁶ = 54112657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54112727) 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, 19955 + ... + 22503.

It is an arithmetic number, because the mean of its divisors is an integer number (3855600).

Almost surely, 2^54112721 is an apocalyptic number.

It is an amenable number.

54112721 is a deficient number, since it is larger than the sum of its proper divisors (7576879).

54112721 is a wasteful number, since it uses less digits than its factorization.

54112721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2656.

The product of its digits is 560, while the sum is 23.

The square root of 54112721 is about 7356.1349226343. The cubic root of 54112721 is about 378.2391313697.

Adding to 54112721 its reverse (12721145), we get a palindrome (66833866).

The spelling of 54112721 in words is "fifty-four million, one hundred twelve thousand, seven hundred twenty-one".