1231032538 has 4 divisors (see below), whose sum is σ = 1846548810. Its totient is φ = 615516268.

The previous prime is 1231032533. The next prime is 1231032547. The reversal of 1231032538 is 8352301321.

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

It can be written as a sum of positive squares in only one way, i.e., 1155116169 + 75916369 = 33987^2 + 8713^2 .

It is a super-2 number, since 2×1231032538² = 3030882219229442888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1231032533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307758133 + ... + 307758136.

Almost surely, 2^1231032538 is an apocalyptic number.

1231032538 is a deficient number, since it is larger than the sum of its proper divisors (615516272).

1231032538 is an equidigital number, since it uses as much as digits as its factorization.

1231032538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615516271.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 1231032538 is about 35086.0732770141. The cubic root of 1231032538 is about 1071.7409971714.

Adding to 1231032538 its reverse (8352301321), we get a palindrome (9583333859).

The spelling of 1231032538 in words is "one billion, two hundred thirty-one million, thirty-two thousand, five hundred thirty-eight".