1525387313 has 2 divisors, whose sum is σ = 1525387314. Its totient is φ = 1525387312.

The previous prime is 1525387309. The next prime is 1525387319. The reversal of 1525387313 is 3137835251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1524668209 + 719104 = 39047^2 + 848^2 .

It is an emirp because it is prime and its reverse (3137835251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1525387313 - 2² = 1525387309 is a prime.

It is a super-2 number, since 2×1525387313² = 4653612909322719938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1525387319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 762693656 + 762693657.

It is an arithmetic number, because the mean of its divisors is an integer number (762693657).

Almost surely, 2^1525387313 is an apocalyptic number.

It is an amenable number.

1525387313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1525387313 is an equidigital number, since it uses as much as digits as its factorization.

1525387313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 38.

The square root of 1525387313 is about 39056.2070995124. The cubic root of 1525387313 is about 1151.1361960391.

The spelling of 1525387313 in words is "one billion, five hundred twenty-five million, three hundred eighty-seven thousand, three hundred thirteen".