31439144519 has 2 divisors, whose sum is σ = 31439144520. Its totient is φ = 31439144518.

The previous prime is 31439144489. The next prime is 31439144551. The reversal of 31439144519 is 91544193413.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31439144519 - 2²⁰ = 31438095943 is a prime.

It is a super-2 number, since 2×31439144519² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31439144519.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31439144579) by changing a digit.

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 as a sum of consecutive naturals, namely, 15719572259 + 15719572260.

It is an arithmetic number, because the mean of its divisors is an integer number (15719572260).

Almost surely, 2^31439144519 is an apocalyptic number.

31439144519 is a deficient number, since it is larger than the sum of its proper divisors (1).

31439144519 is an equidigital number, since it uses as much as digits as its factorization.

31439144519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 44.

The spelling of 31439144519 in words is "thirty-one billion, four hundred thirty-nine million, one hundred forty-four thousand, five hundred nineteen".