1023255515 has 8 divisors (see below), whose sum is σ = 1230179568. Its totient is φ = 817089120.

The previous prime is 1023255511. The next prime is 1023255521. The reversal of 1023255515 is 5155523201.

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

It is not a de Polignac number, because 1023255515 - 2² = 1023255511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1023255511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186437 + ... + 191846.

It is an arithmetic number, because the mean of its divisors is an integer number (153772446).

Almost surely, 2^1023255515 is an apocalyptic number.

1023255515 is a deficient number, since it is larger than the sum of its proper divisors (206924053).

1023255515 is an equidigital number, since it uses as much as digits as its factorization.

1023255515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378829.

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 1023255515 is about 31988.3653067799. The cubic root of 1023255515 is about 1007.6925118605.

Adding to 1023255515 its reverse (5155523201), we get a palindrome (6178778716).

The spelling of 1023255515 in words is "one billion, twenty-three million, two hundred fifty-five thousand, five hundred fifteen".