54121321 has 4 divisors (see below), whose sum is σ = 55142532. Its totient is φ = 53100112.

The previous prime is 54121313. The next prime is 54121339. The reversal of 54121321 is 12312145.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30647296 + 23474025 = 5536^2 + 4845^2 .

It is a cyclic number.

It is not a de Polignac number, because 54121321 - 2³ = 54121313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54121021) 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, 510526 + ... + 510631.

It is an arithmetic number, because the mean of its divisors is an integer number (13785633).

Almost surely, 2^54121321 is an apocalyptic number.

It is an amenable number.

54121321 is a deficient number, since it is larger than the sum of its proper divisors (1021211).

54121321 is a wasteful number, since it uses less digits than its factorization.

54121321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021210.

The product of its digits is 240, while the sum is 19.

The square root of 54121321 is about 7356.7194455137. The cubic root of 54121321 is about 378.2591678427.

Adding to 54121321 its reverse (12312145), we get a palindrome (66433466).

The spelling of 54121321 in words is "fifty-four million, one hundred twenty-one thousand, three hundred twenty-one".