54885721 has 6 divisors (see below), whose sum is σ = 60329066. Its totient is φ = 49896000.

The previous prime is 54885709. The next prime is 54885731. The reversal of 54885721 is 12758845.

It can be written as a sum of positive squares in only one way, i.e., 50965321 + 3920400 = 7139^2 + 1980^2 .

It is a de Polignac number, because none of the positive numbers 2^k-54885721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54885731) 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, 226680 + ... + 226921.

Almost surely, 2^54885721 is an apocalyptic number.

It is an amenable number.

54885721 is a deficient number, since it is larger than the sum of its proper divisors (5443345).

54885721 is a wasteful number, since it uses less digits than its factorization.

54885721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453623 (or 453612 counting only the distinct ones).

The product of its digits is 89600, while the sum is 40.

The square root of 54885721 is about 7408.4897921236. The cubic root of 54885721 is about 380.0316709522.

The spelling of 54885721 in words is "fifty-four million, eight hundred eighty-five thousand, seven hundred twenty-one".