31222030 has 32 divisors (see below), whose sum is σ = 68008896. Its totient is φ = 10074624.

The previous prime is 31222021. The next prime is 31222091. The reversal of 31222030 is 3022213.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31222030.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 11929 + ... + 14308.

It is an arithmetic number, because the mean of its divisors is an integer number (2125278).

Almost surely, 2^31222030 is an apocalyptic number.

31222030 is an abundant number, since it is smaller than the sum of its proper divisors (36786866).

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

31222030 is a wasteful number, since it uses less digits than its factorization.

31222030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26268.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 31222030 is about 5587.6676708623. The cubic root of 31222030 is about 314.8862611118.

Adding to 31222030 its reverse (3022213), we get a palindrome (34244243).

The spelling of 31222030 in words is "thirty-one million, two hundred twenty-two thousand, thirty".