515253131 has 2 divisors, whose sum is σ = 515253132. Its totient is φ = 515253130.

The previous prime is 515253049. The next prime is 515253149. The reversal of 515253131 is 131352515.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 515253131 - 2¹⁰ = 515252107 is a prime.

It is a super-2 number, since 2×515253131² = 530971578010606322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 515253131.

It is not a weakly prime, because it can be changed into another prime (515253161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257626565 + 257626566.

It is an arithmetic number, because the mean of its divisors is an integer number (257626566).

Almost surely, 2^515253131 is an apocalyptic number.

515253131 is a deficient number, since it is larger than the sum of its proper divisors (1).

515253131 is an equidigital number, since it uses as much as digits as its factorization.

515253131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2250, while the sum is 26.

The square root of 515253131 is about 22699.1878929622. The cubic root of 515253131 is about 801.6907631949.

The spelling of 515253131 in words is "five hundred fifteen million, two hundred fifty-three thousand, one hundred thirty-one".