30721106 has 8 divisors (see below), whose sum is σ = 49626444. Its totient is φ = 14178960.

The previous prime is 30721073. The next prime is 30721111. The reversal of 30721106 is 60112703.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 30151081 + 570025 = 5491^2 + 755^2 .

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

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 590765 + ... + 590816.

Almost surely, 2^30721106 is an apocalyptic number.

30721106 is a deficient number, since it is larger than the sum of its proper divisors (18905338).

30721106 is a wasteful number, since it uses less digits than its factorization.

30721106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181596.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 30721106 is about 5542.6623566658. The cubic root of 30721106 is about 313.1931697932.

Adding to 30721106 its reverse (60112703), we get a palindrome (90833809).

The spelling of 30721106 in words is "thirty million, seven hundred twenty-one thousand, one hundred six".