31228814 has 16 divisors (see below), whose sum is σ = 48275808. Its totient is φ = 15139872.

The previous prime is 31228801. The next prime is 31228817. The reversal of 31228814 is 41882213.

It is a super-3 number, since 3×31228814³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31228817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28847 + ... + 29909.

It is an arithmetic number, because the mean of its divisors is an integer number (3017238).

Almost surely, 2^31228814 is an apocalyptic number.

31228814 is a deficient number, since it is larger than the sum of its proper divisors (17046994).

31228814 is a wasteful number, since it uses less digits than its factorization.

31228814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1499.

The product of its digits is 3072, while the sum is 29.

The square root of 31228814 is about 5588.2746890252. The cubic root of 31228814 is about 314.9090658824.

The spelling of 31228814 in words is "thirty-one million, two hundred twenty-eight thousand, eight hundred fourteen".