54338781 has 16 divisors (see below), whose sum is σ = 83286144. Its totient is φ = 30869184.

The previous prime is 54338777. The next prime is 54338831. The reversal of 54338781 is 18783345.

54338781 = 211² + 212² + ... + 556².

It is not a de Polignac number, because 54338781 - 2² = 54338777 is a prime.

It is a super-2 number, since 2×54338781² = 5905406241131922, 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 (54338701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3846 + ... + 11111.

It is an arithmetic number, because the mean of its divisors is an integer number (5205384).

Almost surely, 2^54338781 is an apocalyptic number.

It is an amenable number.

54338781 is a deficient number, since it is larger than the sum of its proper divisors (28947363).

54338781 is a wasteful number, since it uses less digits than its factorization.

54338781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15140.

The product of its digits is 80640, while the sum is 39.

The square root of 54338781 is about 7371.4843145733. The cubic root of 54338781 is about 378.7651071755.

The spelling of 54338781 in words is "fifty-four million, three hundred thirty-eight thousand, seven hundred eighty-one".