83388881331381 has 16 divisors (see below), whose sum is σ = 116019951008256. Its totient is φ = 53175226181616.

The previous prime is 83388881331373. The next prime is 83388881331403. The reversal of 83388881331381 is 18313318888338.

83388881331381 is a nontrivial binomial coefficient, being equal to C(12914247, 2).

It is not a de Polignac number, because 83388881331381 - 2³ = 83388881331373 is a prime.

It is a super-2 number, since 2×83388881331381² (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 (83388881371381) 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, 9685686 + ... + 16142808.

It is an arithmetic number, because the mean of its divisors is an integer number (7251246938016).

Almost surely, 2^{83388881331381} is an apocalyptic number.

83388881331381 is the 12914246-th triangular number.

It is an amenable number.

83388881331381 is a deficient number, since it is larger than the sum of its proper divisors (32631069676875).

83388881331381 is a wasteful number, since it uses less digits than its factorization.

83388881331381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6644312.

The product of its digits is 63700992, while the sum is 66.

The spelling of 83388881331381 in words is "eighty-three trillion, three hundred eighty-eight billion, eight hundred eighty-one million, three hundred thirty-one thousand, three hundred eighty-one".