54172781 has 12 divisors (see below), whose sum is σ = 61751520. Its totient is φ = 47370960.

The previous prime is 54172771. The next prime is 54172801. The reversal of 54172781 is 18727145.

It is not a de Polignac number, because 54172781 - 2¹⁰ = 54171757 is a prime.

It is a super-2 number, since 2×54172781² = 5869380402547922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54172771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5225 + ... + 11646.

It is an arithmetic number, because the mean of its divisors is an integer number (5145960).

Almost surely, 2^54172781 is an apocalyptic number.

It is an amenable number.

54172781 is a deficient number, since it is larger than the sum of its proper divisors (7578739).

54172781 is a wasteful number, since it uses less digits than its factorization.

54172781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16916 (or 16903 counting only the distinct ones).

The product of its digits is 15680, while the sum is 35.

The square root of 54172781 is about 7360.2160973711. The cubic root of 54172781 is about 378.3790161780.

The spelling of 54172781 in words is "fifty-four million, one hundred seventy-two thousand, seven hundred eighty-one".