11543056331 has 2 divisors, whose sum is σ = 11543056332. Its totient is φ = 11543056330.

The previous prime is 11543056313. The next prime is 11543056351. The reversal of 11543056331 is 13365034511.

Together with previous prime (11543056313) 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 11543056331 - 2¹⁸ = 11542794187 is a prime.

It is a super-2 number, since 2×11543056331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11543056351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5771528165 + 5771528166.

It is an arithmetic number, because the mean of its divisors is an integer number (5771528166).

Almost surely, 2^11543056331 is an apocalyptic number.

11543056331 is a deficient number, since it is larger than the sum of its proper divisors (1).

11543056331 is an equidigital number, since it uses as much as digits as its factorization.

11543056331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 32.

The spelling of 11543056331 in words is "eleven billion, five hundred forty-three million, fifty-six thousand, three hundred thirty-one".