1381332557 has 8 divisors (see below), whose sum is σ = 1511110080. Its totient is φ = 1252255360.

The previous prime is 1381332523. The next prime is 1381332593. The reversal of 1381332557 is 7552331831.

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

It is a cyclic number.

It is not a de Polignac number, because 1381332557 - 2¹² = 1381328461 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1381332557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381332457) 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, 170948 + ... + 178845.

It is an arithmetic number, because the mean of its divisors is an integer number (188888760).

Almost surely, 2^1381332557 is an apocalyptic number.

It is an amenable number.

1381332557 is a deficient number, since it is larger than the sum of its proper divisors (129777523).

1381332557 is a wasteful number, since it uses less digits than its factorization.

1381332557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350163.

The product of its digits is 75600, while the sum is 38.

The square root of 1381332557 is about 37166.2825286576. The cubic root of 1381332557 is about 1113.6945198747.

The spelling of 1381332557 in words is "one billion, three hundred eighty-one million, three hundred thirty-two thousand, five hundred fifty-seven".