1311331032 has 112 divisors (see below), whose sum is σ = 4021759080. Its totient is φ = 397353600.

The previous prime is 1311331013. The next prime is 1311331051. The reversal of 1311331032 is 2301331131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1311331013) and next prime (1311331051).

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1311330996 and 1311331014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 53932 + ... + 74372.

Almost surely, 2^1311331032 is an apocalyptic number.

1311331032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1311331032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2010879540).

1311331032 is an abundant number, since it is smaller than the sum of its proper divisors (2710428048).

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

1311331032 is a wasteful number, since it uses less digits than its factorization.

1311331032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20476 (or 20457 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1311331032 is about 36212.3049804897. The cubic root of 1311331032 is about 1094.5546396787.

Adding to 1311331032 its reverse (2301331131), we get a palindrome (3612662163).

Subtracting 1311331032 from its reverse (2301331131), we obtain a palindrome (990000099).

The spelling of 1311331032 in words is "one billion, three hundred eleven million, three hundred thirty-one thousand, thirty-two".