1381333065 has 32 divisors (see below), whose sum is σ = 2550894336. Its totient is φ = 625209600.

The previous prime is 1381333049. The next prime is 1381333073. The reversal of 1381333065 is 5603331831.

It is not a de Polignac number, because 1381333065 - 2⁴ = 1381333049 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54522 + ... + 75731.

It is an arithmetic number, because the mean of its divisors is an integer number (79715448).

Almost surely, 2^1381333065 is an apocalyptic number.

1381333065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1381333065 is a deficient number, since it is larger than the sum of its proper divisors (1169561271).

1381333065 is a wasteful number, since it uses less digits than its factorization.

1381333065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130369.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 1381333065 is about 37166.2893628083. The cubic root of 1381333065 is about 1113.6946563991.

Adding to 1381333065 its reverse (5603331831), we get a palindrome (6984664896).

The spelling of 1381333065 in words is "one billion, three hundred eighty-one million, three hundred thirty-three thousand, sixty-five".