1330530557 has 4 divisors (see below), whose sum is σ = 1349270496. Its totient is φ = 1311790620.

The previous prime is 1330530541. The next prime is 1330530559. The reversal of 1330530557 is 7550350331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7550350331 = 1493 ⋅5057167.

It is a cyclic number.

It is not a de Polignac number, because 1330530557 - 2⁴ = 1330530541 is a prime.

It is a super-2 number, since 2×1330530557² = 3540623126221460498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1330530559) 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, 9369863 + ... + 9370004.

It is an arithmetic number, because the mean of its divisors is an integer number (337317624).

Almost surely, 2^1330530557 is an apocalyptic number.

It is an amenable number.

1330530557 is a deficient number, since it is larger than the sum of its proper divisors (18739939).

1330530557 is an equidigital number, since it uses as much as digits as its factorization.

1330530557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18739938.

The product of its (nonzero) digits is 23625, while the sum is 32.

The square root of 1330530557 is about 36476.4383815087. The cubic root of 1330530557 is about 1099.8706616525.

Adding to 1330530557 its reverse (7550350331), we get a palindrome (8880880888).

The spelling of 1330530557 in words is "one billion, three hundred thirty million, five hundred thirty thousand, five hundred fifty-seven".