31004144021 has 8 divisors (see below), whose sum is σ = 31333910400. Its totient is φ = 30674930832.

The previous prime is 31004144011. The next prime is 31004144051. The reversal of 31004144021 is 12044140013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31004144021 - 2¹⁰ = 31004142997 is a prime.

It is a super-2 number, since 2×31004144021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31004143984 and 31004144002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31004144011) 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 7 ways as a sum of consecutive naturals, for example, 25121 + ... + 250278.

It is an arithmetic number, because the mean of its divisors is an integer number (3916738800).

Almost surely, 2^31004144021 is an apocalyptic number.

It is an amenable number.

31004144021 is a deficient number, since it is larger than the sum of its proper divisors (329766379).

31004144021 is a wasteful number, since it uses less digits than its factorization.

31004144021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276595.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 31004144021 its reverse (12044140013), we get a palindrome (43048284034).

The spelling of 31004144021 in words is "thirty-one billion, four million, one hundred forty-four thousand, twenty-one".