31135124 has 6 divisors (see below), whose sum is σ = 54486474. Its totient is φ = 15567560.

The previous prime is 31135121. The next prime is 31135147. The reversal of 31135124 is 42153113.

It can be written as a sum of positive squares in only one way, i.e., 31024900 + 110224 = 5570^2 + 332^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31135096 and 31135105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31135121) 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 as a sum of consecutive naturals, namely, 3891887 + ... + 3891894.

It is an arithmetic number, because the mean of its divisors is an integer number (9081079).

Almost surely, 2^31135124 is an apocalyptic number.

It is an amenable number.

31135124 is a deficient number, since it is larger than the sum of its proper divisors (23351350).

31135124 is a wasteful number, since it uses less digits than its factorization.

31135124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7783785 (or 7783783 counting only the distinct ones).

The product of its digits is 360, while the sum is 20.

The square root of 31135124 is about 5579.8856619110. The cubic root of 31135124 is about 314.5938293980.

Adding to 31135124 its reverse (42153113), we get a palindrome (73288237).

The spelling of 31135124 in words is "thirty-one million, one hundred thirty-five thousand, one hundred twenty-four".