53211503581 has 2 divisors, whose sum is σ = 53211503582. Its totient is φ = 53211503580.

The previous prime is 53211503573. The next prime is 53211503603. The reversal of 53211503581 is 18530511235.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46099954681 + 7111548900 = 214709^2 + 84330^2 .

It is a cyclic number.

It is not a de Polignac number, because 53211503581 - 2³ = 53211503573 is a prime.

It is a super-2 number, since 2×53211503581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53211503981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26605751790 + 26605751791.

It is an arithmetic number, because the mean of its divisors is an integer number (26605751791).

Almost surely, 2^53211503581 is an apocalyptic number.

It is an amenable number.

53211503581 is a deficient number, since it is larger than the sum of its proper divisors (1).

53211503581 is an equidigital number, since it uses as much as digits as its factorization.

53211503581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 53211503581 in words is "fifty-three billion, two hundred eleven million, five hundred three thousand, five hundred eighty-one".