54212821 has 8 divisors (see below), whose sum is σ = 58643424. Its totient is φ = 49819440.

The previous prime is 54212819. The next prime is 54212827. The reversal of 54212821 is 12821245.

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

It is a cyclic number.

It is not a de Polignac number, because 54212821 - 2¹ = 54212819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54212827) 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, 6235 + ... + 12136.

It is an arithmetic number, because the mean of its divisors is an integer number (7330428).

Almost surely, 2^54212821 is an apocalyptic number.

It is an amenable number.

54212821 is a deficient number, since it is larger than the sum of its proper divisors (4430603).

54212821 is a wasteful number, since it uses less digits than its factorization.

54212821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18611.

The product of its digits is 1280, while the sum is 25.

The square root of 54212821 is about 7362.9356237849. The cubic root of 54212821 is about 378.4722152868.

The spelling of 54212821 in words is "fifty-four million, two hundred twelve thousand, eight hundred twenty-one".