54721918 has 12 divisors (see below), whose sum is σ = 82599840. Its totient is φ = 27189596.

The previous prime is 54721907. The next prime is 54721939. The reversal of 54721918 is 81912745.

Its product of digits (20160) is a multiple of the sum of its prime divisors (720).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 114003 + ... + 114481.

It is an arithmetic number, because the mean of its divisors is an integer number (6883320).

Almost surely, 2^54721918 is an apocalyptic number.

54721918 is a deficient number, since it is larger than the sum of its proper divisors (27877922).

54721918 is an equidigital number, since it uses as much as digits as its factorization.

54721918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959 (or 720 counting only the distinct ones).

The product of its digits is 20160, while the sum is 37.

The square root of 54721918 is about 7397.4264443792. The cubic root of 54721918 is about 379.6532339808.

The spelling of 54721918 in words is "fifty-four million, seven hundred twenty-one thousand, nine hundred eighteen".