30769221 has 16 divisors (see below), whose sum is σ = 46972928. Its totient is φ = 17550000.

The previous prime is 30769217. The next prime is 30769223. The reversal of 30769221 is 12296703.

It is not a de Polignac number, because 30769221 - 2² = 30769217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30769223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14796 + ... + 16746.

It is an arithmetic number, because the mean of its divisors is an integer number (2935808).

Almost surely, 2^30769221 is an apocalyptic number.

It is an amenable number.

30769221 is a deficient number, since it is larger than the sum of its proper divisors (16203707).

30769221 is a wasteful number, since it uses less digits than its factorization.

30769221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2712.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 30769221 is about 5547.0010816657. The cubic root of 30769221 is about 313.3565908746.

The spelling of 30769221 in words is "thirty million, seven hundred sixty-nine thousand, two hundred twenty-one".