54021155 has 16 divisors (see below), whose sum is σ = 69154560. Its totient is φ = 40369152.

The previous prime is 54021091. The next prime is 54021157. The reversal of 54021155 is 55112045.

It is a happy number.

It is not a de Polignac number, because 54021155 - 2⁶ = 54021091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54021155.

It is not an unprimeable number, because it can be changed into a prime (54021157) 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 15 ways as a sum of consecutive naturals, for example, 9326 + ... + 13964.

It is an arithmetic number, because the mean of its divisors is an integer number (4322160).

Almost surely, 2^54021155 is an apocalyptic number.

54021155 is a deficient number, since it is larger than the sum of its proper divisors (15133405).

54021155 is a wasteful number, since it uses less digits than its factorization.

54021155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4798.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 54021155 is about 7349.9085028319. The cubic root of 54021155 is about 378.0256670980.

The spelling of 54021155 in words is "fifty-four million, twenty-one thousand, one hundred fifty-five".