3121525481 has 2 divisors, whose sum is σ = 3121525482. Its totient is φ = 3121525480.

The previous prime is 3121525441. The next prime is 3121525483. The reversal of 3121525481 is 1845251213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1999878400 + 1121647081 = 44720^2 + 33491^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121525481 - 2⁶ = 3121525417 is a prime.

It is a super-2 number, since 2×3121525481² = 19487842657064562722, which contains 22 as substring.

Together with 3121525483, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3121525483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560762740 + 1560762741.

It is an arithmetic number, because the mean of its divisors is an integer number (1560762741).

Almost surely, 2^3121525481 is an apocalyptic number.

It is an amenable number.

3121525481 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121525481 is an equidigital number, since it uses as much as digits as its factorization.

3121525481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9600, while the sum is 32.

The square root of 3121525481 is about 55870.6137517747. The cubic root of 3121525481 is about 1461.4668252236.

Adding to 3121525481 its reverse (1845251213), we get a palindrome (4966776694).

The spelling of 3121525481 in words is "three billion, one hundred twenty-one million, five hundred twenty-five thousand, four hundred eighty-one".