54423355421 has 2 divisors, whose sum is σ = 54423355422. Its totient is φ = 54423355420.

The previous prime is 54423355381. The next prime is 54423355457. The reversal of 54423355421 is 12455332445.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48889632100 + 5533723321 = 221110^2 + 74389^2 .

It is a cyclic number.

It is not a de Polignac number, because 54423355421 - 2¹⁴ = 54423339037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54423355471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27211677710 + 27211677711.

It is an arithmetic number, because the mean of its divisors is an integer number (27211677711).

Almost surely, 2^54423355421 is an apocalyptic number.

It is an amenable number.

54423355421 is a deficient number, since it is larger than the sum of its proper divisors (1).

54423355421 is an equidigital number, since it uses as much as digits as its factorization.

54423355421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288000, while the sum is 38.

Adding to 54423355421 its reverse (12455332445), we get a palindrome (66878687866).

The spelling of 54423355421 in words is "fifty-four billion, four hundred twenty-three million, three hundred fifty-five thousand, four hundred twenty-one".