1131631534 has 16 divisors (see below), whose sum is σ = 1858314240. Its totient is φ = 512557560.

The previous prime is 1131631531. The next prime is 1131631561. The reversal of 1131631534 is 4351361311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131631531) 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 7 ways as a sum of consecutive naturals, for example, 84654 + ... + 97105.

It is an arithmetic number, because the mean of its divisors is an integer number (116144640).

Almost surely, 2^1131631534 is an apocalyptic number.

1131631534 is a deficient number, since it is larger than the sum of its proper divisors (726682706).

1131631534 is a wasteful number, since it uses less digits than its factorization.

1131631534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182055.

The product of its digits is 3240, while the sum is 28.

The square root of 1131631534 is about 33639.7314793088. The cubic root of 1131631534 is about 1042.0814864749.

Adding to 1131631534 its reverse (4351361311), we get a palindrome (5482992845).

The spelling of 1131631534 in words is "one billion, one hundred thirty-one million, six hundred thirty-one thousand, five hundred thirty-four".