31124032 has 14 divisors (see below), whose sum is σ = 61761878. Its totient is φ = 15561984.

The previous prime is 31124029. The next prime is 31124039. The reversal of 31124032 is 23042113.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17106496 + 14017536 = 4136^2 + 3744^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 31123997 and 31124015.

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 as a sum of consecutive naturals, namely, 243093 + ... + 243220.

Almost surely, 2^31124032 is an apocalyptic number.

31124032 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31124032 is a deficient number, since it is larger than the sum of its proper divisors (30637846).

31124032 is an equidigital number, since it uses as much as digits as its factorization.

31124032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486325 (or 486315 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 31124032 is about 5578.8916461964. The cubic root of 31124032 is about 314.5564665661.

Adding to 31124032 its reverse (23042113), we get a palindrome (54166145).

The spelling of 31124032 in words is "thirty-one million, one hundred twenty-four thousand, thirty-two".