1135431531 has 12 divisors (see below), whose sum is σ = 1766227008. Its totient is φ = 698727024.

The previous prime is 1135431511. The next prime is 1135431533. The reversal of 1135431531 is 1351345311.

It is a happy number.

1135431531 is a `hidden beast` number, since 113 + 543 + 1 + 5 + 3 + 1 = 666.

It is not a de Polignac number, because 1135431531 - 2⁹ = 1135431019 is a prime.

It is a super-2 number, since 2×1135431531² = 2578409523178007922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1135431495 and 1135431504.

It is not an unprimeable number, because it can be changed into a prime (1135431533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4852155 + ... + 4852388.

It is an arithmetic number, because the mean of its divisors is an integer number (147185584).

Almost surely, 2^1135431531 is an apocalyptic number.

1135431531 is a deficient number, since it is larger than the sum of its proper divisors (630795477).

1135431531 is a wasteful number, since it uses less digits than its factorization.

1135431531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9704562 (or 9704559 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 1135431531 is about 33696.1649301519. The cubic root of 1135431531 is about 1043.2466131743.

Adding to 1135431531 its reverse (1351345311), we get a palindrome (2486776842).

The spelling of 1135431531 in words is "one billion, one hundred thirty-five million, four hundred thirty-one thousand, five hundred thirty-one".