54705281 has 4 divisors (see below), whose sum is σ = 56591700. Its totient is φ = 52818864.

The previous prime is 54705263. The next prime is 54705289. The reversal of 54705281 is 18250745.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26615281 + 28090000 = 5159^2 + 5300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54705281 is a prime.

It is a super-2 number, since 2×54705281² = 5985335538577922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54705289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 943166 + ... + 943223.

It is an arithmetic number, because the mean of its divisors is an integer number (14147925).

Almost surely, 2^54705281 is an apocalyptic number.

It is an amenable number.

54705281 is a deficient number, since it is larger than the sum of its proper divisors (1886419).

54705281 is a wasteful number, since it uses less digits than its factorization.

54705281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1886418.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 54705281 is about 7396.3018461931. The cubic root of 54705281 is about 379.6147549990.

The spelling of 54705281 in words is "fifty-four million, seven hundred five thousand, two hundred eighty-one".