1131022631 has 24 divisors (see below), whose sum is σ = 1292586624. Its totient is φ = 985121280.

The previous prime is 1131022621. The next prime is 1131022661. The reversal of 1131022631 is 1362201311.

It is not a de Polignac number, because 1131022631 - 2³⁰ = 57280807 is a prime.

It is a super-2 number, since 2×1131022631² = 2558424383668324322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131022621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 276755 + ... + 280811.

It is an arithmetic number, because the mean of its divisors is an integer number (53857776).

Almost surely, 2^1131022631 is an apocalyptic number.

1131022631 is a deficient number, since it is larger than the sum of its proper divisors (161563993).

1131022631 is a wasteful number, since it uses less digits than its factorization.

1131022631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4151 (or 4128 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1131022631 is about 33630.6799068945. The cubic root of 1131022631 is about 1041.8945468318.

Adding to 1131022631 its reverse (1362201311), we get a palindrome (2493223942).

The spelling of 1131022631 in words is "one billion, one hundred thirty-one million, twenty-two thousand, six hundred thirty-one".