6381022139 has 4 divisors (see below), whose sum is σ = 6381483240. Its totient is φ = 6380561040.

The previous prime is 6381022117. The next prime is 6381022157. The reversal of 6381022139 is 9312201836.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6381022139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6381022099 and 6381022108.

It is not an unprimeable number, because it can be changed into a prime (6381022159) 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, 209129 + ... + 237690.

It is an arithmetic number, because the mean of its divisors is an integer number (1595370810).

Almost surely, 2^6381022139 is an apocalyptic number.

6381022139 is a deficient number, since it is larger than the sum of its proper divisors (461101).

6381022139 is a wasteful number, since it uses less digits than its factorization.

6381022139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461100.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 6381022139 is about 79881.3003086455. The cubic root of 6381022139 is about 1854.7985617847.

The spelling of 6381022139 in words is "six billion, three hundred eighty-one million, twenty-two thousand, one hundred thirty-nine".