1331155140 has 48 divisors (see below), whose sum is σ = 4259697792. Its totient is φ = 304263936.

The previous prime is 1331155139. The next prime is 1331155141. The reversal of 1331155140 is 415511331.

It is an interprime number because it is at equal distance from previous prime (1331155139) and next prime (1331155141).

It is a self number, because there is not a number n which added to its sum of digits gives 1331155140.

It is not an unprimeable number, because it can be changed into a prime (1331155141) 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, 1584289 + ... + 1585128.

It is an arithmetic number, because the mean of its divisors is an integer number (88743704).

Almost surely, 2^1331155140 is an apocalyptic number.

1331155140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331155140 is an abundant number, since it is smaller than the sum of its proper divisors (2928542652).

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

1331155140 is a wasteful number, since it uses less digits than its factorization.

1331155140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3169436 (or 3169434 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 1331155140 is about 36484.9988351377. The cubic root of 1331155140 is about 1100.0427366316.

Adding to 1331155140 its reverse (415511331), we get a palindrome (1746666471).

The spelling of 1331155140 in words is "one billion, three hundred thirty-one million, one hundred fifty-five thousand, one hundred forty".