2131478322938 has 8 divisors (see below), whose sum is σ = 3225511444788. Its totient is φ = 1056307841344.

The previous prime is 2131478322907. The next prime is 2131478322971. The reversal of 2131478322938 is 8392238741312.

It can be written as a sum of positive squares in 2 ways, for example, as 2026901758249 + 104576564689 = 1423693^2 + 323383^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2131478322938.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4715659781 + ... + 4715660232.

Almost surely, 2^{2131478322938} is an apocalyptic number.

2131478322938 is a deficient number, since it is larger than the sum of its proper divisors (1094033121850).

2131478322938 is a wasteful number, since it uses less digits than its factorization.

2131478322938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9431320128.

The product of its digits is 3483648, while the sum is 53.

The spelling of 2131478322938 in words is "two trillion, one hundred thirty-one billion, four hundred seventy-eight million, three hundred twenty-two thousand, nine hundred thirty-eight".