54827781 has 8 divisors (see below), whose sum is σ = 73137984. Its totient is φ = 36534720.

The previous prime is 54827779. The next prime is 54827797. The reversal of 54827781 is 18772845.

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

It is not a de Polignac number, because 54827781 - 2¹ = 54827779 is a prime.

It is a super-2 number, since 2×54827781² = 6012171138767922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54827681) 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 7 ways as a sum of consecutive naturals, for example, 9741 + ... + 14301.

It is an arithmetic number, because the mean of its divisors is an integer number (9142248).

Almost surely, 2^54827781 is an apocalyptic number.

It is an amenable number.

54827781 is a deficient number, since it is larger than the sum of its proper divisors (18310203).

54827781 is a wasteful number, since it uses less digits than its factorization.

54827781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8571.

The product of its digits is 125440, while the sum is 42.

The square root of 54827781 is about 7404.5783809748. The cubic root of 54827781 is about 379.8978973144.

The spelling of 54827781 in words is "fifty-four million, eight hundred twenty-seven thousand, seven hundred eighty-one".