31124412065 has 8 divisors (see below), whose sum is σ = 37357861608. Its totient is φ = 24893818240.

The previous prime is 31124412049. The next prime is 31124412079. The reversal of 31124412065 is 56021442113.

It can be written as a sum of positive squares in 4 ways, for example, as 4158831121 + 26965580944 = 64489^2 + 164212^2 .

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

It is not a de Polignac number, because 31124412065 - 2⁴ = 31124412049 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 689876 + ... + 733605.

It is an arithmetic number, because the mean of its divisors is an integer number (4669732701).

Almost surely, 2^31124412065 is an apocalyptic number.

It is an amenable number.

31124412065 is a deficient number, since it is larger than the sum of its proper divisors (6233449543).

31124412065 is a wasteful number, since it uses less digits than its factorization.

31124412065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427859.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 31124412065 its reverse (56021442113), we get a palindrome (87145854178).

The spelling of 31124412065 in words is "thirty-one billion, one hundred twenty-four million, four hundred twelve thousand, sixty-five".