1331351380 has 24 divisors (see below), whose sum is σ = 2860859232. Its totient is φ = 520155552.

The previous prime is 1331351377. The next prime is 1331351381. The reversal of 1331351380 is 831531331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331351381) 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, 773182 + ... + 774901.

It is an arithmetic number, because the mean of its divisors is an integer number (119202468).

Almost surely, 2^1331351380 is an apocalyptic number.

1331351380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331351380 is an abundant number, since it is smaller than the sum of its proper divisors (1529507852).

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

1331351380 is a wasteful number, since it uses less digits than its factorization.

1331351380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548135 (or 1548133 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 1331351380 is about 36487.6880604951. The cubic root of 1331351380 is about 1100.0967903811.

The spelling of 1331351380 in words is "one billion, three hundred thirty-one million, three hundred fifty-one thousand, three hundred eighty".