1123144531 has 2 divisors, whose sum is σ = 1123144532. Its totient is φ = 1123144530.

The previous prime is 1123144523. The next prime is 1123144597. The reversal of 1123144531 is 1354413211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1123144531 - 2³ = 1123144523 is a prime.

It is a super-2 number, since 2×1123144531² = 2522907275030419922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1123144496 and 1123144505.

It is not a weakly prime, because it can be changed into another prime (1123144331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561572265 + 561572266.

It is an arithmetic number, because the mean of its divisors is an integer number (561572266).

Almost surely, 2^1123144531 is an apocalyptic number.

1123144531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123144531 is an equidigital number, since it uses as much as digits as its factorization.

1123144531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 25.

The square root of 1123144531 is about 33513.3485494959. The cubic root of 1123144531 is about 1039.4698145117.

Adding to 1123144531 its reverse (1354413211), we get a palindrome (2477557742).

The spelling of 1123144531 in words is "one billion, one hundred twenty-three million, one hundred forty-four thousand, five hundred thirty-one".