1023115565 has 8 divisors (see below), whose sum is σ = 1228121088. Its totient is φ = 818237520.

The previous prime is 1023115549. The next prime is 1023115567. The reversal of 1023115565 is 5655113201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1023115565 - 2⁴ = 1023115549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023115567) 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 in 7 ways as a sum of consecutive naturals, for example, 13217 + ... + 47126.

It is an arithmetic number, because the mean of its divisors is an integer number (153515136).

Almost surely, 2^1023115565 is an apocalyptic number.

It is an amenable number.

1023115565 is a deficient number, since it is larger than the sum of its proper divisors (205005523).

1023115565 is an equidigital number, since it uses as much as digits as its factorization.

1023115565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63739.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 1023115565 is about 31986.1777178831. The cubic root of 1023115565 is about 1007.6465692799.

Adding to 1023115565 its reverse (5655113201), we get a palindrome (6678228766).

The spelling of 1023115565 in words is "one billion, twenty-three million, one hundred fifteen thousand, five hundred sixty-five".