31426224 has 40 divisors (see below), whose sum is σ = 82522992. Its totient is φ = 10302720.

The previous prime is 31426223. The next prime is 31426229. The reversal of 31426224 is 42262413.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 = 31426194 and 31426203.

It is not an unprimeable number, because it can be changed into a prime (31426223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2439 + ... + 8294.

Almost surely, 2^31426224 is an apocalyptic number.

It is an amenable number.

31426224 is an abundant number, since it is smaller than the sum of its proper divisors (51096768).

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

31426224 is a wasteful number, since it uses less digits than its factorization.

31426224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10805 (or 10799 counting only the distinct ones).

The product of its digits is 2304, while the sum is 24.

The square root of 31426224 is about 5605.9097388381. The cubic root of 31426224 is about 315.5712285485.

Adding to 31426224 its reverse (42262413), we get a palindrome (73688637).

The spelling of 31426224 in words is "thirty-one million, four hundred twenty-six thousand, two hundred twenty-four".