1020343223515 has 32 divisors (see below), whose sum is σ = 1526837889024. Its totient is φ = 635933773440.

The previous prime is 1020343223513. The next prime is 1020343223521. The reversal of 1020343223515 is 5153223430201.

It is not a de Polignac number, because 1020343223515 - 2¹ = 1020343223513 is a prime.

It is a super-2 number, since 2×1020343223515² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1020343223513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1732837 + ... + 2245753.

It is an arithmetic number, because the mean of its divisors is an integer number (47713684032).

Almost surely, 2^{1020343223515} is an apocalyptic number.

1020343223515 is a deficient number, since it is larger than the sum of its proper divisors (506494665509).

1020343223515 is a wasteful number, since it uses less digits than its factorization.

1020343223515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518107.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 1020343223515 its reverse (5153223430201), we get a palindrome (6173566653716).

The spelling of 1020343223515 in words is "one trillion, twenty billion, three hundred forty-three million, two hundred twenty-three thousand, five hundred fifteen".