1531233673563 has 16 divisors (see below), whose sum is σ = 2344472611200. Its totient is φ = 879177228480.

The previous prime is 1531233673517. The next prime is 1531233673577. The reversal of 1531233673563 is 3653763321351.

It is not a de Polignac number, because 1531233673563 - 2¹⁰ = 1531233672539 is a prime.

It is a super-2 number, since 2×1531233673563² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1531233673063) 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, 1221078858 + ... + 1221080111.

It is an arithmetic number, because the mean of its divisors is an integer number (146529538200).

Almost surely, 2^{1531233673563} is an apocalyptic number.

1531233673563 is a deficient number, since it is larger than the sum of its proper divisors (813238937637).

1531233673563 is a wasteful number, since it uses less digits than its factorization.

1531233673563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2442159002.

The product of its digits is 3061800, while the sum is 48.

The spelling of 1531233673563 in words is "one trillion, five hundred thirty-one billion, two hundred thirty-three million, six hundred seventy-three thousand, five hundred sixty-three".