1520270513 has 2 divisors, whose sum is σ = 1520270514. Its totient is φ = 1520270512.

The previous prime is 1520270471. The next prime is 1520270561. The reversal of 1520270513 is 3150720251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1246301809 + 273968704 = 35303^2 + 16552^2 .

It is a cyclic number.

It is not a de Polignac number, because 1520270513 - 2²⁴ = 1503493297 is a prime.

It is a super-2 number, since 2×1520270513² = 4622444865394566338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1520270573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760135256 + 760135257.

It is an arithmetic number, because the mean of its divisors is an integer number (760135257).

Almost surely, 2^1520270513 is an apocalyptic number.

It is an amenable number.

1520270513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1520270513 is an equidigital number, since it uses as much as digits as its factorization.

1520270513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 1520270513 is about 38990.6464809190. The cubic root of 1520270513 is about 1149.8476201376.

Adding to 1520270513 its reverse (3150720251), we get a palindrome (4670990764).

The spelling of 1520270513 in words is "one billion, five hundred twenty million, two hundred seventy thousand, five hundred thirteen".