53203531421 has 2 divisors, whose sum is σ = 53203531422. Its totient is φ = 53203531420.

The previous prime is 53203531411. The next prime is 53203531463. The reversal of 53203531421 is 12413530235.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49456867321 + 3746664100 = 222389^2 + 61210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53203531421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53203531411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26601765710 + 26601765711.

It is an arithmetic number, because the mean of its divisors is an integer number (26601765711).

Almost surely, 2^53203531421 is an apocalyptic number.

It is an amenable number.

53203531421 is a deficient number, since it is larger than the sum of its proper divisors (1).

53203531421 is an equidigital number, since it uses as much as digits as its factorization.

53203531421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 29.

The spelling of 53203531421 in words is "fifty-three billion, two hundred three million, five hundred thirty-one thousand, four hundred twenty-one".