54155771 has 4 divisors (see below), whose sum is σ = 55177632. Its totient is φ = 53133912.

The previous prime is 54155767. The next prime is 54155819. The reversal of 54155771 is 17755145.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17755145 = 5 ⋅3551029.

It is a cyclic number.

It is not a de Polignac number, because 54155771 - 2² = 54155767 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54155071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510851 + ... + 510956.

It is an arithmetic number, because the mean of its divisors is an integer number (13794408).

Almost surely, 2^54155771 is an apocalyptic number.

54155771 is a deficient number, since it is larger than the sum of its proper divisors (1021861).

54155771 is a wasteful number, since it uses less digits than its factorization.

54155771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021860.

The product of its digits is 24500, while the sum is 35.

The square root of 54155771 is about 7359.0604699241. The cubic root of 54155771 is about 378.3394089515.

The spelling of 54155771 in words is "fifty-four million, one hundred fifty-five thousand, seven hundred seventy-one".