31998226 has 16 divisors (see below), whose sum is σ = 51821784. Its totient is φ = 14730624.

The previous prime is 31998203. The next prime is 31998227. The reversal of 31998226 is 62289913.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 26471025 + 5527201 = 5145^2 + 2351^2 .

It is not an unprimeable number, because it can be changed into a prime (31998227) 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, 10536 + ... + 13228.

Almost surely, 2^31998226 is an apocalyptic number.

31998226 is a deficient number, since it is larger than the sum of its proper divisors (19823558).

31998226 is a wasteful number, since it uses less digits than its factorization.

31998226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3165.

The product of its digits is 46656, while the sum is 40.

The square root of 31998226 is about 5656.6974463904. The cubic root of 31998226 is about 317.4743435155.

The spelling of 31998226 in words is "thirty-one million, nine hundred ninety-eight thousand, two hundred twenty-six".