31124036 has 12 divisors (see below), whose sum is σ = 54769260. Its totient is φ = 15475680.

The previous prime is 31124029. The next prime is 31124039. The reversal of 31124036 is 63042113.

It can be written as a sum of positive squares in 2 ways, for example, as 5317636 + 25806400 = 2306^2 + 5080^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31123999 and 31124017.

It is not an unprimeable number, because it can be changed into a prime (31124039) 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, 20771 + ... + 22218.

It is an arithmetic number, because the mean of its divisors is an integer number (4564105).

Almost surely, 2^31124036 is an apocalyptic number.

It is an amenable number.

31124036 is a deficient number, since it is larger than the sum of its proper divisors (23645224).

31124036 is a wasteful number, since it uses less digits than its factorization.

31124036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43174 (or 43172 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 31124036 is about 5578.8920046905. The cubic root of 31124036 is about 314.5564800414.

Adding to 31124036 its reverse (63042113), we get a palindrome (94166149).

The spelling of 31124036 in words is "thirty-one million, one hundred twenty-four thousand, thirty-six".