31465228 has 6 divisors (see below), whose sum is σ = 55064156. Its totient is φ = 15732612.

The previous prime is 31465223. The next prime is 31465243. The reversal of 31465228 is 82256413.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 31465228.

It is not an unprimeable number, because it can be changed into a prime (31465223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3933150 + ... + 3933157.

Almost surely, 2^31465228 is an apocalyptic number.

It is an amenable number.

31465228 is a deficient number, since it is larger than the sum of its proper divisors (23598928).

31465228 is a wasteful number, since it uses less digits than its factorization.

31465228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7866311 (or 7866309 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 31465228 is about 5609.3874888440. The cubic root of 31465228 is about 315.7017294484.

The spelling of 31465228 in words is "thirty-one million, four hundred sixty-five thousand, two hundred twenty-eight".