1331375530 has 8 divisors (see below), whose sum is σ = 2396475972. Its totient is φ = 532550208.

The previous prime is 1331375497. The next prime is 1331375561. The reversal of 1331375530 is 355731331.

It can be written as a sum of positive squares in 2 ways, for example, as 1296648081 + 34727449 = 36009^2 + 5893^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1331375492 and 1331375501.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66568767 + ... + 66568786.

Almost surely, 2^1331375530 is an apocalyptic number.

1331375530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1331375530 is a deficient number, since it is larger than the sum of its proper divisors (1065100442).

1331375530 is a wasteful number, since it uses less digits than its factorization.

1331375530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133137560.

The product of its (nonzero) digits is 14175, while the sum is 31.

The square root of 1331375530 is about 36488.0189925406. The cubic root of 1331375530 is about 1100.1034420628.

The spelling of 1331375530 in words is "one billion, three hundred thirty-one million, three hundred seventy-five thousand, five hundred thirty".