1155345431 has 2 divisors, whose sum is σ = 1155345432. Its totient is φ = 1155345430.

The previous prime is 1155345403. The next prime is 1155345469. The reversal of 1155345431 is 1345435511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1155345431 - 2³⁰ = 81603607 is a prime.

It is a super-2 number, since 2×1155345431² = 2669646129865151522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155345731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577672715 + 577672716.

It is an arithmetic number, because the mean of its divisors is an integer number (577672716).

Almost surely, 2^1155345431 is an apocalyptic number.

1155345431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155345431 is an equidigital number, since it uses as much as digits as its factorization.

1155345431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 32.

The square root of 1155345431 is about 33990.3726222588. The cubic root of 1155345431 is about 1049.3103350171.

The spelling of 1155345431 in words is "one billion, one hundred fifty-five million, three hundred forty-five thousand, four hundred thirty-one".