1311231032 has 8 divisors (see below), whose sum is σ = 2458558200. Its totient is φ = 655615512.

The previous prime is 1311231017. The next prime is 1311231067. The reversal of 1311231032 is 2301321131.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1311231032.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81951932 + ... + 81951947.

It is an arithmetic number, because the mean of its divisors is an integer number (307319775).

Almost surely, 2^1311231032 is an apocalyptic number.

It is an amenable number.

1311231032 is a deficient number, since it is larger than the sum of its proper divisors (1147327168).

1311231032 is a wasteful number, since it uses less digits than its factorization.

1311231032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163903885 (or 163903881 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1311231032 is about 36210.9242080342. The cubic root of 1311231032 is about 1094.5268159780.

Adding to 1311231032 its reverse (2301321131), we get a palindrome (3612552163).

Subtracting 1311231032 from its reverse (2301321131), we obtain a palindrome (990090099).

It can be divided in two parts, 13112 and 31032, that added together give a palindrome (44144).

The spelling of 1311231032 in words is "one billion, three hundred eleven million, two hundred thirty-one thousand, thirty-two".