138782082230421 has 16 divisors (see below), whose sum is σ = 211825856446464. Its totient is φ = 79173397810224.

The previous prime is 138782082230417. The next prime is 138782082230437. The reversal of 138782082230421 is 124032280287831.

It is a happy number.

It is not a de Polignac number, because 138782082230421 - 2² = 138782082230417 is a prime.

It is a super-2 number, since 2×138782082230421² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138782082240421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5443702725 + ... + 5443728218.

It is an arithmetic number, because the mean of its divisors is an integer number (13239116027904).

Almost surely, 2^{138782082230421} is an apocalyptic number.

It is an amenable number.

138782082230421 is a deficient number, since it is larger than the sum of its proper divisors (73043774216043).

138782082230421 is a wasteful number, since it uses less digits than its factorization.

138782082230421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10887431560.

The product of its (nonzero) digits is 2064384, while the sum is 51.

The spelling of 138782082230421 in words is "one hundred thirty-eight trillion, seven hundred eighty-two billion, eighty-two million, two hundred thirty thousand, four hundred twenty-one".