1381330557 has 8 divisors (see below), whose sum is σ = 2046415680. Its totient is φ = 920887020.

The previous prime is 1381330553. The next prime is 1381330567. The reversal of 1381330557 is 7550331831.

It is a happy number.

It is not a de Polignac number, because 1381330557 - 2² = 1381330553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381330553) 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, 25580169 + ... + 25580222.

It is an arithmetic number, because the mean of its divisors is an integer number (255801960).

Almost surely, 2^1381330557 is an apocalyptic number.

It is an amenable number.

1381330557 is a deficient number, since it is larger than the sum of its proper divisors (665085123).

1381330557 is an equidigital number, since it uses as much as digits as its factorization.

1381330557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51160400 (or 51160394 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 1381330557 is about 37166.2556225402. The cubic root of 1381330557 is about 1113.6939823768.

The spelling of 1381330557 in words is "one billion, three hundred eighty-one million, three hundred thirty thousand, five hundred fifty-seven".