31000142005 has 32 divisors (see below), whose sum is σ = 46062238464. Its totient is φ = 19541523456.

The previous prime is 31000141993. The next prime is 31000142009. The reversal of 31000142005 is 50024100013.

It is not a de Polignac number, because 31000142005 - 2²⁷ = 30865924277 is a prime.

It is a super-2 number, since 2×31000142005² (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 31000142005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31000142009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 580242 + ... + 631411.

It is an arithmetic number, because the mean of its divisors is an integer number (1439444952).

Almost surely, 2^31000142005 is an apocalyptic number.

31000142005 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31000142005 is a deficient number, since it is larger than the sum of its proper divisors (15062096459).

31000142005 is a wasteful number, since it uses less digits than its factorization.

31000142005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211725.

The product of its (nonzero) digits is 120, while the sum is 16.

Adding to 31000142005 its reverse (50024100013), we get a palindrome (81024242018).

The spelling of 31000142005 in words is "thirty-one billion, one hundred forty-two thousand, five".