1331117620 has 24 divisors (see below), whose sum is σ = 3194682624. Its totient is φ = 456383136.

The previous prime is 1331117611. The next prime is 1331117633. The reversal of 1331117620 is 267111331.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4753852 + ... + 4754131.

It is an arithmetic number, because the mean of its divisors is an integer number (133111776).

Almost surely, 2^1331117620 is an apocalyptic number.

1331117620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331117620 is an abundant number, since it is smaller than the sum of its proper divisors (1863565004).

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

1331117620 is a wasteful number, since it uses less digits than its factorization.

1331117620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9507999 (or 9507997 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 1331117620 is about 36484.4846475868. The cubic root of 1331117620 is about 1100.0324012494.

Adding to 1331117620 its reverse (267111331), we get a palindrome (1598228951).

The spelling of 1331117620 in words is "one billion, three hundred thirty-one million, one hundred seventeen thousand, six hundred twenty".