53419155421 has 2 divisors, whose sum is σ = 53419155422. Its totient is φ = 53419155420.

The previous prime is 53419155407. The next prime is 53419155497. The reversal of 53419155421 is 12455191435.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28228704196 + 25190451225 = 168014^2 + 158715^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53419155421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53419155221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26709577710 + 26709577711.

It is an arithmetic number, because the mean of its divisors is an integer number (26709577711).

Almost surely, 2^53419155421 is an apocalyptic number.

It is an amenable number.

53419155421 is a deficient number, since it is larger than the sum of its proper divisors (1).

53419155421 is an equidigital number, since it uses as much as digits as its factorization.

53419155421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108000, while the sum is 40.

The spelling of 53419155421 in words is "fifty-three billion, four hundred nineteen million, one hundred fifty-five thousand, four hundred twenty-one".