31124136 has 16 divisors (see below), whose sum is σ = 77810400. Its totient is φ = 10374704.

The previous prime is 31124123. The next prime is 31124143. The reversal of 31124136 is 63142113.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 648396 + ... + 648443.

It is an arithmetic number, because the mean of its divisors is an integer number (4863150).

Almost surely, 2^31124136 is an apocalyptic number.

It is an amenable number.

31124136 is an abundant number, since it is smaller than the sum of its proper divisors (46686264).

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

31124136 is a wasteful number, since it uses less digits than its factorization.

31124136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296848 (or 1296844 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

The square root of 31124136 is about 5578.9009670364. The cubic root of 31124136 is about 314.5568169259.

Adding to 31124136 its reverse (63142113), we get a palindrome (94266249).

The spelling of 31124136 in words is "thirty-one million, one hundred twenty-four thousand, one hundred thirty-six".