1380831055 has 4 divisors (see below), whose sum is σ = 1656997272. Its totient is φ = 1104664840.

The previous prime is 1380831043. The next prime is 1380831097. The reversal of 1380831055 is 5501380831.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-1380831055 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 1380831055.

It is a congruent number.

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, 138083101 + ... + 138083110.

It is an arithmetic number, because the mean of its divisors is an integer number (414249318).

Almost surely, 2^1380831055 is an apocalyptic number.

1380831055 is a deficient number, since it is larger than the sum of its proper divisors (276166217).

1380831055 is an equidigital number, since it uses as much as digits as its factorization.

1380831055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276166216.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 1380831055 is about 37159.5351827764. The cubic root of 1380831055 is about 1113.5597254857.

The spelling of 1380831055 in words is "one billion, three hundred eighty million, eight hundred thirty-one thousand, fifty-five".