31142004 has 12 divisors (see below), whose sum is σ = 72664704. Its totient is φ = 10380664.

The previous prime is 31142003. The next prime is 31142021. The reversal of 31142004 is 40024113.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31142003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1297572 + ... + 1297595.

It is an arithmetic number, because the mean of its divisors is an integer number (6055392).

Almost surely, 2^31142004 is an apocalyptic number.

It is an amenable number.

31142004 is an abundant number, since it is smaller than the sum of its proper divisors (41522700).

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

31142004 is a wasteful number, since it uses less digits than its factorization.

31142004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2595174 (or 2595172 counting only the distinct ones).

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

The square root of 31142004 is about 5580.5021279451. The cubic root of 31142004 is about 314.6169998656.

Adding to 31142004 its reverse (40024113), we get a palindrome (71166117).

The spelling of 31142004 in words is "thirty-one million, one hundred forty-two thousand, four".