1523136321217 has 4 divisors (see below), whose sum is σ = 1740727224256. Its totient is φ = 1305545418180.

The previous prime is 1523136321193. The next prime is 1523136321263. The reversal of 1523136321217 is 7121236313251.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1523136321217 - 2²³ = 1523127932609 is a prime.

It is a super-2 number, since 2×1523136321217² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1523136322217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108795451509 + ... + 108795451522.

It is an arithmetic number, because the mean of its divisors is an integer number (435181806064).

Almost surely, 2^{1523136321217} is an apocalyptic number.

It is an amenable number.

1523136321217 is a deficient number, since it is larger than the sum of its proper divisors (217590903039).

1523136321217 is an equidigital number, since it uses as much as digits as its factorization.

1523136321217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217590903038.

The product of its digits is 45360, while the sum is 37.

The spelling of 1523136321217 in words is "one trillion, five hundred twenty-three billion, one hundred thirty-six million, three hundred twenty-one thousand, two hundred seventeen".