1153545431 has 2 divisors, whose sum is σ = 1153545432. Its totient is φ = 1153545430.

The previous prime is 1153545413. The next prime is 1153545451. The reversal of 1153545431 is 1345453511.

Together with previous prime (1153545413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (1345453511) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1153545431 is a prime.

It is a super-2 number, since 2×1153545431² = 2661334122761951522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1153545451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 576772715 + 576772716.

It is an arithmetic number, because the mean of its divisors is an integer number (576772716).

Almost surely, 2^1153545431 is an apocalyptic number.

1153545431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1153545431 is an equidigital number, since it uses as much as digits as its factorization.

1153545431 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 1153545431 is about 33963.8842154427. The cubic root of 1153545431 is about 1048.7651184720.

Adding to 1153545431 its reverse (1345453511), we get a palindrome (2498998942).

The spelling of 1153545431 in words is "one billion, one hundred fifty-three million, five hundred forty-five thousand, four hundred thirty-one".