31124030 has 64 divisors (see below), whose sum is σ = 67174272. Its totient is φ = 10160640.

The previous prime is 31124029. The next prime is 31124039. The reversal of 31124030 is 3042113.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31123996 and 31124014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31124039) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 157892 + ... + 158088.

It is an arithmetic number, because the mean of its divisors is an integer number (1049598).

Almost surely, 2^31124030 is an apocalyptic number.

31124030 is an abundant number, since it is smaller than the sum of its proper divisors (36050242).

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

31124030 is a wasteful number, since it uses less digits than its factorization.

31124030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 31124030 is about 5578.8914669493. The cubic root of 31124030 is about 314.5564598284.

Adding to 31124030 its reverse (3042113), we get a palindrome (34166143).

The spelling of 31124030 in words is "thirty-one million, one hundred twenty-four thousand, thirty".