1231130236 has 48 divisors (see below), whose sum is σ = 2500485120. Its totient is φ = 519488640.

The previous prime is 1231130227. The next prime is 1231130237. The reversal of 1231130236 is 6320311321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231130237) 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, 674421 + ... + 676243.

It is an arithmetic number, because the mean of its divisors is an integer number (52093440).

Almost surely, 2^1231130236 is an apocalyptic number.

It is an amenable number.

1231130236 is an abundant number, since it is smaller than the sum of its proper divisors (1269354884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231130236 is a wasteful number, since it uses less digits than its factorization.

1231130236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2194 (or 2192 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 1231130236 is about 35087.4655112050. The cubic root of 1231130236 is about 1071.7693484886.

Adding to 1231130236 its reverse (6320311321), we get a palindrome (7551441557).

The spelling of 1231130236 in words is "one billion, two hundred thirty-one million, one hundred thirty thousand, two hundred thirty-six".