1155231431523 has 96 divisors (see below), whose sum is σ = 1829220696576. Its totient is φ = 698314051584.

The previous prime is 1155231431521. The next prime is 1155231431537. The reversal of 1155231431523 is 3251341325511.

It is a happy number.

1155231431523 is a `hidden beast` number, since 1 + 1 + 5 + 5 + 2 + 314 + 315 + 23 = 666.

It is not a de Polignac number, because 1155231431523 - 2¹ = 1155231431521 is a prime.

It is a super-3 number, since 3×1155231431523³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1155231431521) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 949244611 + ... + 949245827.

It is an arithmetic number, because the mean of its divisors is an integer number (19054382256).

Almost surely, 2^{1155231431523} is an apocalyptic number.

1155231431523 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1155231431523 is a deficient number, since it is larger than the sum of its proper divisors (673989265053).

1155231431523 is a wasteful number, since it uses less digits than its factorization.

1155231431523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913 (or 1910 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The spelling of 1155231431523 in words is "one trillion, one hundred fifty-five billion, two hundred thirty-one million, four hundred thirty-one thousand, five hundred twenty-three".