1231131052 has 24 divisors (see below), whose sum is σ = 2195035920. Its totient is φ = 604016640.

The previous prime is 1231131047. The next prime is 1231131059. The reversal of 1231131052 is 2501311321.

It is not an unprimeable number, because it can be changed into a prime (1231131059) 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 7 ways as a sum of consecutive naturals, for example, 131652 + ... + 140692.

It is an arithmetic number, because the mean of its divisors is an integer number (91459830).

Almost surely, 2^1231131052 is an apocalyptic number.

It is an amenable number.

1231131052 is a deficient number, since it is larger than the sum of its proper divisors (963904868).

1231131052 is a wasteful number, since it uses less digits than its factorization.

1231131052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9681 (or 9679 counting only the distinct ones).

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

The square root of 1231131052 is about 35087.4771392872. The cubic root of 1231131052 is about 1071.7695852802.

Adding to 1231131052 its reverse (2501311321), we get a palindrome (3732442373).

The spelling of 1231131052 in words is "one billion, two hundred thirty-one million, one hundred thirty-one thousand, fifty-two".