54620021 has 8 divisors (see below), whose sum is σ = 57088920. Its totient is φ = 52190208.

The previous prime is 54620011. The next prime is 54620053. The reversal of 54620021 is 12002645.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7921 + 54612100 = 89^2 + 7390^2 .

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 54620021 - 2²² = 50425717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 54619975 and 54620002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54620011) 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, 6896 + ... + 12521.

It is an arithmetic number, because the mean of its divisors is an integer number (7136115).

Almost surely, 2^54620021 is an apocalyptic number.

It is an amenable number.

54620021 is a deficient number, since it is larger than the sum of its proper divisors (2468899).

54620021 is a wasteful number, since it uses less digits than its factorization.

54620021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19543.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 54620021 is about 7390.5359074968. The cubic root of 54620021 is about 379.4174383812.

Adding to 54620021 its reverse (12002645), we get a palindrome (66622666).

The spelling of 54620021 in words is "fifty-four million, six hundred twenty thousand, twenty-one".