31000142004 has 24 divisors (see below), whose sum is σ = 77897793120. Its totient is φ = 9538505184.

The previous prime is 31000141993. The next prime is 31000142009. The reversal of 31000142004 is 40024100013.

It is a super-2 number, since 2×31000142004² (a number of 22 digits) contains 22 as substring.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99359274 + ... + 99359585.

It is an arithmetic number, because the mean of its divisors is an integer number (3245741380).

Almost surely, 2^31000142004 is an apocalyptic number.

It is an amenable number.

31000142004 is an abundant number, since it is smaller than the sum of its proper divisors (46897651116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31000142004 is a wasteful number, since it uses less digits than its factorization.

31000142004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198718879 (or 198718877 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 31000142004 its reverse (40024100013), we get a palindrome (71024242017).

The spelling of 31000142004 in words is "thirty-one billion, one hundred forty-two thousand, four".