1123432531 has 4 divisors (see below), whose sum is σ = 1209850432. Its totient is φ = 1037014632.

The previous prime is 1123432487. The next prime is 1123432543. The reversal of 1123432531 is 1352343211.

It is a happy number.

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 1123432531 - 2¹⁹ = 1122908243 is a prime.

It is a super-2 number, since 2×1123432531² = 2524201303418131922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1123432496 and 1123432505.

It is not an unprimeable number, because it can be changed into a prime (1123432571) 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, 43208931 + ... + 43208956.

It is an arithmetic number, because the mean of its divisors is an integer number (302462608).

Almost surely, 2^1123432531 is an apocalyptic number.

1123432531 is a deficient number, since it is larger than the sum of its proper divisors (86417901).

1123432531 is an equidigital number, since it uses as much as digits as its factorization.

1123432531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86417900.

The product of its digits is 2160, while the sum is 25.

The square root of 1123432531 is about 33517.6450694257. The cubic root of 1123432531 is about 1039.5586548802.

Adding to 1123432531 its reverse (1352343211), we get a palindrome (2475775742).

The spelling of 1123432531 in words is "one billion, one hundred twenty-three million, four hundred thirty-two thousand, five hundred thirty-one".