54320021 has 8 divisors (see below), whose sum is σ = 62126400. Its totient is φ = 46525248.

The previous prime is 54320009. The next prime is 54320023. The reversal of 54320021 is 12002345.

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

It is not a de Polignac number, because 54320021 - 2¹⁴ = 54303637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54320023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12845 + ... + 16541.

It is an arithmetic number, because the mean of its divisors is an integer number (7765800).

Almost surely, 2^54320021 is an apocalyptic number.

It is an amenable number.

54320021 is a deficient number, since it is larger than the sum of its proper divisors (7806379).

54320021 is a wasteful number, since it uses less digits than its factorization.

54320021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5803.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 54320021 is about 7370.2117337292. The cubic root of 54320021 is about 378.7215136857.

Adding to 54320021 its reverse (12002345), we get a palindrome (66322366).

The spelling of 54320021 in words is "fifty-four million, three hundred twenty thousand, twenty-one".