54421432921 has 2 divisors, whose sum is σ = 54421432922. Its totient is φ = 54421432920.

The previous prime is 54421432867. The next prime is 54421432927. The reversal of 54421432921 is 12923412445.

54421432921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45881640000 + 8539792921 = 214200^2 + 92411^2 .

It is a cyclic number.

It is not a de Polignac number, because 54421432921 - 2¹⁷ = 54421301849 is a prime.

It is a super-2 number, since 2×54421432921² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (54421432927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27210716460 + 27210716461.

It is an arithmetic number, because the mean of its divisors is an integer number (27210716461).

Almost surely, 2^54421432921 is an apocalyptic number.

It is an amenable number.

54421432921 is a deficient number, since it is larger than the sum of its proper divisors (1).

54421432921 is an equidigital number, since it uses as much as digits as its factorization.

54421432921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 37.

The spelling of 54421432921 in words is "fifty-four billion, four hundred twenty-one million, four hundred thirty-two thousand, nine hundred twenty-one".