1161043531 has 2 divisors, whose sum is σ = 1161043532. Its totient is φ = 1161043530.

The previous prime is 1161043529. The next prime is 1161043567. The reversal of 1161043531 is 1353401611.

It is a weak prime.

It is an emirp because it is prime and its reverse (1353401611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1161043531 - 2¹ = 1161043529 is a prime.

It is a super-2 number, since 2×1161043531² = 2696044161753895922, which contains 22 as substring.

Together with 1161043529, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1161043496 and 1161043505.

It is not a weakly prime, because it can be changed into another prime (1161013531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580521765 + 580521766.

It is an arithmetic number, because the mean of its divisors is an integer number (580521766).

Almost surely, 2^1161043531 is an apocalyptic number.

1161043531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161043531 is an equidigital number, since it uses as much as digits as its factorization.

1161043531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1161043531 is about 34074.0888506208. The cubic root of 1161043531 is about 1051.0325537332.

The spelling of 1161043531 in words is "one billion, one hundred sixty-one million, forty-three thousand, five hundred thirty-one".