31242226 has 8 divisors (see below), whose sum is σ = 49620060. Its totient is φ = 14702208.

The previous prime is 31242223. The next prime is 31242247. The reversal of 31242226 is 62224213.

It can be written as a sum of positive squares in 2 ways, for example, as 28355625 + 2886601 = 5325^2 + 1699^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 31242197 and 31242206.

It is not an unprimeable number, because it can be changed into a prime (31242223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459411 + ... + 459478.

Almost surely, 2^31242226 is an apocalyptic number.

31242226 is a deficient number, since it is larger than the sum of its proper divisors (18377834).

31242226 is a wasteful number, since it uses less digits than its factorization.

31242226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918908.

The product of its digits is 1152, while the sum is 22.

The square root of 31242226 is about 5589.4745728020. The cubic root of 31242226 is about 314.9541413042.

Adding to 31242226 its reverse (62224213), we get a palindrome (93466439).

The spelling of 31242226 in words is "thirty-one million, two hundred forty-two thousand, two hundred twenty-six".