1232231531 has 2 divisors, whose sum is σ = 1232231532. Its totient is φ = 1232231530.

The previous prime is 1232231527. The next prime is 1232231549. The reversal of 1232231531 is 1351322321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1232231531 - 2² = 1232231527 is a prime.

It is a super-2 number, since 2×1232231531² = 3036789091981207922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1232231497 and 1232231506.

It is not a weakly prime, because it can be changed into another prime (1232231501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616115765 + 616115766.

It is an arithmetic number, because the mean of its divisors is an integer number (616115766).

Almost surely, 2^1232231531 is an apocalyptic number.

1232231531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232231531 is an equidigital number, since it uses as much as digits as its factorization.

1232231531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 23.

The square root of 1232231531 is about 35103.1555704042. The cubic root of 1232231531 is about 1072.0888333579.

Adding to 1232231531 its reverse (1351322321), we get a palindrome (2583553852).

The spelling of 1232231531 in words is "one billion, two hundred thirty-two million, two hundred thirty-one thousand, five hundred thirty-one".