1131202531 has 2 divisors, whose sum is σ = 1131202532. Its totient is φ = 1131202530.

The previous prime is 1131202447. The next prime is 1131202577. The reversal of 1131202531 is 1352021311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1131202531 - 2¹⁵ = 1131169763 is a prime.

It is a super-2 number, since 2×1131202531² = 2559238332281611922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1131202499 and 1131202508.

It is not a weakly prime, because it can be changed into another prime (1131202931) 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 as a sum of consecutive naturals, namely, 565601265 + 565601266.

It is an arithmetic number, because the mean of its divisors is an integer number (565601266).

Almost surely, 2^1131202531 is an apocalyptic number.

1131202531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131202531 is an equidigital number, since it uses as much as digits as its factorization.

1131202531 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1131202531 is about 33633.3544416848. The cubic root of 1131202531 is about 1041.9497850109.

Adding to 1131202531 its reverse (1352021311), we get a palindrome (2483223842).

The spelling of 1131202531 in words is "one billion, one hundred thirty-one million, two hundred two thousand, five hundred thirty-one".