30722243 has 4 divisors (see below), whose sum is σ = 31471608. Its totient is φ = 29972880.

The previous prime is 30722239. The next prime is 30722249. The reversal of 30722243 is 34222703.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34222703 = 157 ⋅217979.

It is a cyclic number.

It is not a de Polignac number, because 30722243 - 2² = 30722239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30722249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 374621 + ... + 374702.

It is an arithmetic number, because the mean of its divisors is an integer number (7867902).

Almost surely, 2^30722243 is an apocalyptic number.

30722243 is a deficient number, since it is larger than the sum of its proper divisors (749365).

30722243 is an equidigital number, since it uses as much as digits as its factorization.

30722243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749364.

The product of its (nonzero) digits is 2016, while the sum is 23.

The square root of 30722243 is about 5542.7649237542. The cubic root of 30722243 is about 313.1970335456.

Adding to 30722243 its reverse (34222703), we get a palindrome (64944946).

The spelling of 30722243 in words is "thirty million, seven hundred twenty-two thousand, two hundred forty-three".