31124420 has 24 divisors (see below), whose sum is σ = 66192000. Its totient is φ = 12291552.

The previous prime is 31124411. The next prime is 31124441. The reversal of 31124420 is 2442113.

It is a super-3 number, since 3×31124420³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8270 + ... + 11429.

It is an arithmetic number, because the mean of its divisors is an integer number (2758000).

Almost surely, 2^31124420 is an apocalyptic number.

It is an amenable number.

31124420 is an abundant number, since it is smaller than the sum of its proper divisors (35067580).

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

31124420 is a wasteful number, since it uses less digits than its factorization.

31124420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19787 (or 19785 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 31124420 is about 5578.9264200203. The cubic root of 31124420 is about 314.5577736739.

Adding to 31124420 its reverse (2442113), we get a palindrome (33566533).

The spelling of 31124420 in words is "thirty-one million, one hundred twenty-four thousand, four hundred twenty".