1023515012255 has 8 divisors (see below), whose sum is σ = 1229457393024. Its totient is φ = 817985757600.

The previous prime is 1023515012251. The next prime is 1023515012309. The reversal of 1023515012255 is 5522105153201.

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

It is not a de Polignac number, because 1023515012255 - 2² = 1023515012251 is a prime.

It is a super-2 number, since 2×1023515012255² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023515012251) 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, 103276076 + ... + 103285985.

It is an arithmetic number, because the mean of its divisors is an integer number (153682174128).

Almost surely, 2^{1023515012255} is an apocalyptic number.

1023515012255 is a deficient number, since it is larger than the sum of its proper divisors (205942380769).

1023515012255 is an equidigital number, since it uses as much as digits as its factorization.

1023515012255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206563057.

The product of its (nonzero) digits is 15000, while the sum is 32.

The spelling of 1023515012255 in words is "one trillion, twenty-three billion, five hundred fifteen million, twelve thousand, two hundred fifty-five".