1165225513 has 2 divisors, whose sum is σ = 1165225514. Its totient is φ = 1165225512.

The previous prime is 1165225447. The next prime is 1165225519. The reversal of 1165225513 is 3155225611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 640494864 + 524730649 = 25308^2 + 22907^2 .

It is an emirp because it is prime and its reverse (3155225611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1165225513 - 2²⁵ = 1131671081 is a prime.

It is a super-2 number, since 2×1165225513² = 2715500992292226338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1165225519) 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, 582612756 + 582612757.

It is an arithmetic number, because the mean of its divisors is an integer number (582612757).

Almost surely, 2^1165225513 is an apocalyptic number.

It is an amenable number.

1165225513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165225513 is an equidigital number, since it uses as much as digits as its factorization.

1165225513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9000, while the sum is 31.

The square root of 1165225513 is about 34135.3997047054. The cubic root of 1165225513 is about 1052.2929522028.

The spelling of 1165225513 in words is "one billion, one hundred sixty-five million, two hundred twenty-five thousand, five hundred thirteen".