31124124 has 54 divisors (see below), whose sum is σ = 81701984. Its totient is φ = 9979920.

The previous prime is 31124123. The next prime is 31124143. The reversal of 31124124 is 42142113.

It is a super-2 number, since 2×31124124² = 1937422189534752, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

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

It is a junction number, because it is equal to n+sod(n) for n = 31124097 and 31124106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31124123) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 186289 + ... + 186455.

Almost surely, 2^31124124 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31124124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40850992).

31124124 is an abundant number, since it is smaller than the sum of its proper divisors (50577860).

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

31124124 is a wasteful number, since it uses less digits than its factorization.

31124124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375 (or 203 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 31124124 is about 5578.8998915557. The cubic root of 31124124 is about 314.5567764998.

Adding to 31124124 its reverse (42142113), we get a palindrome (73266237).

The spelling of 31124124 in words is "thirty-one million, one hundred twenty-four thousand, one hundred twenty-four".