53015442421 has 2 divisors, whose sum is σ = 53015442422. Its totient is φ = 53015442420.

The previous prime is 53015442407. The next prime is 53015442443. The reversal of 53015442421 is 12424451035.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52473064900 + 542377521 = 229070^2 + 23289^2 .

It is a cyclic number.

It is not a de Polignac number, because 53015442421 - 2³³ = 44425507829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53015472421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26507721210 + 26507721211.

It is an arithmetic number, because the mean of its divisors is an integer number (26507721211).

Almost surely, 2^53015442421 is an apocalyptic number.

It is an amenable number.

53015442421 is a deficient number, since it is larger than the sum of its proper divisors (1).

53015442421 is an equidigital number, since it uses as much as digits as its factorization.

53015442421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 53015442421 its reverse (12424451035), we get a palindrome (65439893456).

The spelling of 53015442421 in words is "fifty-three billion, fifteen million, four hundred forty-two thousand, four hundred twenty-one".