53451415421 has 2 divisors, whose sum is σ = 53451415422. Its totient is φ = 53451415420.

The previous prime is 53451415399. The next prime is 53451415441. The reversal of 53451415421 is 12451415435.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53418765625 + 32649796 = 231125^2 + 5714^2 .

It is a cyclic number.

It is not a de Polignac number, because 53451415421 - 2¹⁴ = 53451399037 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53451415441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26725707710 + 26725707711.

It is an arithmetic number, because the mean of its divisors is an integer number (26725707711).

Almost surely, 2^53451415421 is an apocalyptic number.

It is an amenable number.

53451415421 is a deficient number, since it is larger than the sum of its proper divisors (1).

53451415421 is an equidigital number, since it uses as much as digits as its factorization.

53451415421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48000, while the sum is 35.

The spelling of 53451415421 in words is "fifty-three billion, four hundred fifty-one million, four hundred fifteen thousand, four hundred twenty-one".