1331133620 has 24 divisors (see below), whose sum is σ = 2812126464. Its totient is φ = 529263776.

The previous prime is 1331133569. The next prime is 1331133623. The reversal of 1331133620 is 263311331.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331133623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195932 + ... + 202611.

It is an arithmetic number, because the mean of its divisors is an integer number (117171936).

Almost surely, 2^1331133620 is an apocalyptic number.

1331133620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331133620 is an abundant number, since it is smaller than the sum of its proper divisors (1480992844).

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

1331133620 is a wasteful number, since it uses less digits than its factorization.

1331133620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398719 (or 398717 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 1331133620 is about 36484.7039182176. The cubic root of 1331133620 is about 1100.0368086856.

Adding to 1331133620 its reverse (263311331), we get a palindrome (1594444951).

The spelling of 1331133620 in words is "one billion, three hundred thirty-one million, one hundred thirty-three thousand, six hundred twenty".