57312121481 has 2 divisors, whose sum is σ = 57312121482. Its totient is φ = 57312121480.

The previous prime is 57312121457. The next prime is 57312121513. The reversal of 57312121481 is 18412121375.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34114090000 + 23198031481 = 184700^2 + 152309^2 .

It is a cyclic number.

It is not a de Polignac number, because 57312121481 - 2³⁰ = 56238379657 is a prime.

It is a super-2 number, since 2×57312121481² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (57312121081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28656060740 + 28656060741.

It is an arithmetic number, because the mean of its divisors is an integer number (28656060741).

Almost surely, 2^57312121481 is an apocalyptic number.

It is an amenable number.

57312121481 is a deficient number, since it is larger than the sum of its proper divisors (1).

57312121481 is an equidigital number, since it uses as much as digits as its factorization.

57312121481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 35.

It can be divided in two parts, 5731 and 2121481, that added together give a palindrome (2127212).

The spelling of 57312121481 in words is "fifty-seven billion, three hundred twelve million, one hundred twenty-one thousand, four hundred eighty-one".