53194348421 has 2 divisors, whose sum is σ = 53194348422. Its totient is φ = 53194348420.

The previous prime is 53194348387. The next prime is 53194348451. The reversal of 53194348421 is 12484349135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53194348321 + 100 = 230639^2 + 10^2 .

It is a cyclic number.

It is not a de Polignac number, because 53194348421 - 2¹⁰ = 53194347397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53194348451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26597174210 + 26597174211.

It is an arithmetic number, because the mean of its divisors is an integer number (26597174211).

Almost surely, 2^53194348421 is an apocalyptic number.

It is an amenable number.

53194348421 is a deficient number, since it is larger than the sum of its proper divisors (1).

53194348421 is an equidigital number, since it uses as much as digits as its factorization.

53194348421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 44.

The spelling of 53194348421 in words is "fifty-three billion, one hundred ninety-four million, three hundred forty-eight thousand, four hundred twenty-one".