1123543153531 has 2 divisors, whose sum is σ = 1123543153532. Its totient is φ = 1123543153530.

The previous prime is 1123543153517. The next prime is 1123543153543. The reversal of 1123543153531 is 1353513453211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1123543153531 - 2¹¹ = 1123543151483 is a prime.

It is a super-2 number, since 2×1123543153531² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1123543153511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561771576765 + 561771576766.

It is an arithmetic number, because the mean of its divisors is an integer number (561771576766).

Almost surely, 2^{1123543153531} is an apocalyptic number.

1123543153531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123543153531 is an equidigital number, since it uses as much as digits as its factorization.

1123543153531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81000, while the sum is 37.

The spelling of 1123543153531 in words is "one trillion, one hundred twenty-three billion, five hundred forty-three million, one hundred fifty-three thousand, five hundred thirty-one".