1123533431 has 2 divisors, whose sum is σ = 1123533432. Its totient is φ = 1123533430.

The previous prime is 1123533413. The next prime is 1123533473. The reversal of 1123533431 is 1343353211.

Together with previous prime (1123533413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1123533431 - 2¹⁴ = 1123517047 is a prime.

It is a super-2 number, since 2×1123533431² = 2524654741149263522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1123533431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123523431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561766715 + 561766716.

It is an arithmetic number, because the mean of its divisors is an integer number (561766716).

Almost surely, 2^1123533431 is an apocalyptic number.

1123533431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123533431 is an equidigital number, since it uses as much as digits as its factorization.

1123533431 is an evil number, because the sum of its binary digits is even.

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

The square root of 1123533431 is about 33519.1502129753. The cubic root of 1123533431 is about 1039.5897762649.

Adding to 1123533431 its reverse (1343353211), we get a palindrome (2466886642).

The spelling of 1123533431 in words is "one billion, one hundred twenty-three million, five hundred thirty-three thousand, four hundred thirty-one".