1331551343 has 4 divisors (see below), whose sum is σ = 1338523008. Its totient is φ = 1324579680.

The previous prime is 1331551337. The next prime is 1331551381. The reversal of 1331551343 is 3431551331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1331551343 - 2¹⁸ = 1331289199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331551643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3485546 + ... + 3485927.

It is an arithmetic number, because the mean of its divisors is an integer number (334630752).

Almost surely, 2^1331551343 is an apocalyptic number.

1331551343 is a deficient number, since it is larger than the sum of its proper divisors (6971665).

1331551343 is an equidigital number, since it uses as much as digits as its factorization.

1331551343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6971664.

The product of its digits is 8100, while the sum is 29.

The square root of 1331551343 is about 36490.4281010788. The cubic root of 1331551343 is about 1100.1518641569.

The spelling of 1331551343 in words is "one billion, three hundred thirty-one million, five hundred fifty-one thousand, three hundred forty-three".