1131001543 has 16 divisors (see below), whose sum is σ = 1362135040. Its totient is φ = 917373600.

The previous prime is 1131001541. The next prime is 1131001559. The reversal of 1131001543 is 3451001311.

It is a cyclic number.

It is not a de Polignac number, because 1131001543 - 2¹ = 1131001541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 1131001543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131001541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127513 + ... + 136093.

It is an arithmetic number, because the mean of its divisors is an integer number (85133440).

Almost surely, 2^1131001543 is an apocalyptic number.

1131001543 is a deficient number, since it is larger than the sum of its proper divisors (231133497).

1131001543 is an equidigital number, since it uses as much as digits as its factorization.

1131001543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9598.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1131001543 is about 33630.3663821850. The cubic root of 1131001543 is about 1041.8880713915. Note that the first 3 decimals are identical.

Adding to 1131001543 its reverse (3451001311), we get a palindrome (4582002854).

The spelling of 1131001543 in words is "one billion, one hundred thirty-one million, one thousand, five hundred forty-three".