1131026631 has 16 divisors (see below), whose sum is σ = 1730688000. Its totient is φ = 643593888.

The previous prime is 1131026627. The next prime is 1131026657. The reversal of 1131026631 is 1366201311.

It is not a de Polignac number, because 1131026631 - 2² = 1131026627 is a prime.

It is a super-2 number, since 2×1131026631² = 2558442480062420322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131026431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107656 + ... + 117693.

It is an arithmetic number, because the mean of its divisors is an integer number (108168000).

Almost surely, 2^1131026631 is an apocalyptic number.

1131026631 is a deficient number, since it is larger than the sum of its proper divisors (599661369).

1131026631 is a wasteful number, since it uses less digits than its factorization.

1131026631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225598.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 1131026631 is about 33630.7393763503. The cubic root of 1131026631 is about 1041.8957750929.

Adding to 1131026631 its reverse (1366201311), we get a palindrome (2497227942).

The spelling of 1131026631 in words is "one billion, one hundred thirty-one million, twenty-six thousand, six hundred thirty-one".