1311332136 has 32 divisors (see below), whose sum is σ = 3312133440. Its totient is φ = 432603648.

The previous prime is 1311332129. The next prime is 1311332137. The reversal of 1311332136 is 6312331131.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1311332137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279316 + ... + 283971.

It is an arithmetic number, because the mean of its divisors is an integer number (103504170).

Almost surely, 2^1311332136 is an apocalyptic number.

It is an amenable number.

1311332136 is an abundant number, since it is smaller than the sum of its proper divisors (2000801304).

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

1311332136 is a wasteful number, since it uses less digits than its factorization.

1311332136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563393 (or 563389 counting only the distinct ones).

The product of its digits is 972, while the sum is 24.

The square root of 1311332136 is about 36212.3202239238. The cubic root of 1311332136 is about 1094.5549468445.

Adding to 1311332136 its reverse (6312331131), we get a palindrome (7623663267).

The spelling of 1311332136 in words is "one billion, three hundred eleven million, three hundred thirty-two thousand, one hundred thirty-six".