210031311439 has 4 divisors (see below), whose sum is σ = 211319847256. Its totient is φ = 208742775624.

The previous prime is 210031311421. The next prime is 210031311443. The reversal of 210031311439 is 934113130012.

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

It is a cyclic number.

It is not a de Polignac number, because 210031311439 - 2¹³ = 210031303247 is a prime.

It is a super-2 number, since 2×210031311439² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210031311409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644267664 + ... + 644267989.

It is an arithmetic number, because the mean of its divisors is an integer number (52829961814).

Almost surely, 2^210031311439 is an apocalyptic number.

210031311439 is a deficient number, since it is larger than the sum of its proper divisors (1288535817).

210031311439 is a wasteful number, since it uses less digits than its factorization.

210031311439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288535816.

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 210031311439 in words is "two hundred ten billion, thirty-one million, three hundred eleven thousand, four hundred thirty-nine".