30723222 has 8 divisors (see below), whose sum is σ = 61446456. Its totient is φ = 10241072.

The previous prime is 30723221. The next prime is 30723229. The reversal of 30723222 is 22232703.

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

30723222 is an admirable number.

It is a super-2 number, since 2×30723222² = 1887832740122568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30723221) 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 3 ways as a sum of consecutive naturals, for example, 2560263 + ... + 2560274.

It is an arithmetic number, because the mean of its divisors is an integer number (7680807).

Almost surely, 2^30723222 is an apocalyptic number.

30723222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

30723222 is a wasteful number, since it uses less digits than its factorization.

30723222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5120542.

The product of its (nonzero) digits is 1008, while the sum is 21.

The square root of 30723222 is about 5542.8532363756. The cubic root of 30723222 is about 313.2003603062.

Adding to 30723222 its reverse (22232703), we get a palindrome (52955925).

The spelling of 30723222 in words is "thirty million, seven hundred twenty-three thousand, two hundred twenty-two".