54081391 has 32 divisors (see below), whose sum is σ = 72396800. Its totient is φ = 39191040.

The previous prime is 54081373. The next prime is 54081407. The reversal of 54081391 is 19318045.

It is not a de Polignac number, because 54081391 - 2⁷ = 54081263 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54081311) 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 31 ways as a sum of consecutive naturals, for example, 53095 + ... + 54103.

It is an arithmetic number, because the mean of its divisors is an integer number (2262400).

Almost surely, 2^54081391 is an apocalyptic number.

54081391 is a deficient number, since it is larger than the sum of its proper divisors (18315409).

54081391 is a wasteful number, since it uses less digits than its factorization.

54081391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 54081391 is about 7354.0050992639. The cubic root of 54081391 is about 378.1661200734.

The spelling of 54081391 in words is "fifty-four million, eighty-one thousand, three hundred ninety-one".