1531231030223 has 4 divisors (see below), whose sum is σ = 1531898817528. Its totient is φ = 1530563242920.

The previous prime is 1531231030213. The next prime is 1531231030267. The reversal of 1531231030223 is 3220301321351.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1531231030223 - 2¹⁶ = 1531230964687 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1531231030192 and 1531231030201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1531231030213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333890213 + ... + 333894798.

It is an arithmetic number, because the mean of its divisors is an integer number (382974704382).

Almost surely, 2^{1531231030223} is an apocalyptic number.

1531231030223 is a deficient number, since it is larger than the sum of its proper divisors (667787305).

1531231030223 is an equidigital number, since it uses as much as digits as its factorization.

1531231030223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667787304.

The product of its (nonzero) digits is 3240, while the sum is 26.

Adding to 1531231030223 its reverse (3220301321351), we get a palindrome (4751532351574).

The spelling of 1531231030223 in words is "one trillion, five hundred thirty-one billion, two hundred thirty-one million, thirty thousand, two hundred twenty-three".