54019921 has 2 divisors, whose sum is σ = 54019922. Its totient is φ = 54019920.

The previous prime is 54019891. The next prime is 54019981. The reversal of 54019921 is 12991045.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50908225 + 3111696 = 7135^2 + 1764^2 .

It is a cyclic number.

It is not a de Polignac number, because 54019921 - 2¹³ = 54011729 is a prime.

It is not a weakly prime, because it can be changed into another prime (54019981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27009960 + 27009961.

It is an arithmetic number, because the mean of its divisors is an integer number (27009961).

Almost surely, 2^54019921 is an apocalyptic number.

It is an amenable number.

54019921 is a deficient number, since it is larger than the sum of its proper divisors (1).

54019921 is an equidigital number, since it uses as much as digits as its factorization.

54019921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 54019921 is about 7349.8245557292. The cubic root of 54019921 is about 378.0227886749.

The spelling of 54019921 in words is "fifty-four million, nineteen thousand, nine hundred twenty-one".