31439329999205 has 16 divisors (see below), whose sum is σ = 38072219117040. Its totient is φ = 24921579045888.

The previous prime is 31439329999139. The next prime is 31439329999223. The reversal of 31439329999205 is 50299992393413.

It can be written as a sum of positive squares in 8 ways, for example, as 1032829103524 + 30406500895681 = 1016282^2 + 5514209^2 .

It is a cyclic number.

It is not a de Polignac number, because 31439329999205 - 2¹² = 31439329995109 is a prime.

It is a super-2 number, since 2×31439329999205² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 6223550 + ... + 10080239.

It is an arithmetic number, because the mean of its divisors is an integer number (2379513694815).

Almost surely, 2^{31439329999205} is an apocalyptic number.

It is an amenable number.

31439329999205 is a deficient number, since it is larger than the sum of its proper divisors (6632889117835).

31439329999205 is a wasteful number, since it uses less digits than its factorization.

31439329999205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16307320.

The product of its (nonzero) digits is 127545840, while the sum is 68.

The spelling of 31439329999205 in words is "thirty-one trillion, four hundred thirty-nine billion, three hundred twenty-nine million, nine hundred ninety-nine thousand, two hundred five".