515155531441 has 2 divisors, whose sum is σ = 515155531442. Its totient is φ = 515155531440.

The previous prime is 515155531421. The next prime is 515155531453. The reversal of 515155531441 is 144135551515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 463381079841 + 51774451600 = 680721^2 + 227540^2 .

It is a cyclic number.

It is not a de Polignac number, because 515155531441 - 2²³ = 515147142833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 515155531394 and 515155531403.

It is not a weakly prime, because it can be changed into another prime (515155531421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257577765720 + 257577765721.

It is an arithmetic number, because the mean of its divisors is an integer number (257577765721).

Almost surely, 2^515155531441 is an apocalyptic number.

It is an amenable number.

515155531441 is a deficient number, since it is larger than the sum of its proper divisors (1).

515155531441 is an equidigital number, since it uses as much as digits as its factorization.

515155531441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 150000, while the sum is 40.

The spelling of 515155531441 in words is "five hundred fifteen billion, one hundred fifty-five million, five hundred thirty-one thousand, four hundred forty-one".