11531023423523 has 16 divisors (see below), whose sum is σ = 12595450171392. Its totient is φ = 10523542260000.

The previous prime is 11531023423511. The next prime is 11531023423541. The reversal of 11531023423523 is 32532432013511.

It is a cyclic number.

It is not a de Polignac number, because 11531023423523 - 2⁶ = 11531023423459 is a prime.

It is a super-3 number, since 3×11531023423523³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11531023423553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113840528 + ... + 113941773.

It is an arithmetic number, because the mean of its divisors is an integer number (787215635712).

Almost surely, 2^{11531023423523} is an apocalyptic number.

11531023423523 is a deficient number, since it is larger than the sum of its proper divisors (1064426747869).

11531023423523 is a wasteful number, since it uses less digits than its factorization.

11531023423523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227782426.

The product of its (nonzero) digits is 64800, while the sum is 35.

The spelling of 11531023423523 in words is "eleven trillion, five hundred thirty-one billion, twenty-three million, four hundred twenty-three thousand, five hundred twenty-three".