55364721 has 8 divisors (see below), whose sum is σ = 73944864. Its totient is φ = 36847200.

The previous prime is 55364711. The next prime is 55364723. The reversal of 55364721 is 12746355.

55364721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55364721 - 2⁹ = 55364209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55364723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13551 + ... + 17156.

It is an arithmetic number, because the mean of its divisors is an integer number (9243108).

Almost surely, 2^55364721 is an apocalyptic number.

It is an amenable number.

55364721 is a deficient number, since it is larger than the sum of its proper divisors (18580143).

55364721 is a wasteful number, since it uses less digits than its factorization.

55364721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31311.

The product of its digits is 25200, while the sum is 33.

The square root of 55364721 is about 7440.7473414974. The cubic root of 55364721 is about 381.1340109041.

The spelling of 55364721 in words is "fifty-five million, three hundred sixty-four thousand, seven hundred twenty-one".