54178321 has 4 divisors (see below), whose sum is σ = 54194752. Its totient is φ = 54161892.

The previous prime is 54178301. The next prime is 54178331. The reversal of 54178321 is 12387145.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 54178321 - 2¹⁷ = 54047249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54178301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1365 + ... + 10498.

It is an arithmetic number, because the mean of its divisors is an integer number (13548688).

Almost surely, 2^54178321 is an apocalyptic number.

It is an amenable number.

54178321 is a deficient number, since it is larger than the sum of its proper divisors (16431).

54178321 is a wasteful number, since it uses less digits than its factorization.

54178321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16430.

The product of its digits is 6720, while the sum is 31.

The square root of 54178321 is about 7360.5924353954. The cubic root of 54178321 is about 378.3919140963.

The spelling of 54178321 in words is "fifty-four million, one hundred seventy-eight thousand, three hundred twenty-one".