30685229 has 4 divisors (see below), whose sum is σ = 30796284. Its totient is φ = 30574176.

The previous prime is 30685217. The next prime is 30685253. The reversal of 30685229 is 92258603.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92258603 = 47 ⋅1962949.

It can be written as a sum of positive squares in 2 ways, for example, as 4008004 + 26677225 = 2002^2 + 5165^2 .

It is a cyclic number.

It is not a de Polignac number, because 30685229 - 2²⁰ = 29636653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30685279) 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, 55112 + ... + 55665.

It is an arithmetic number, because the mean of its divisors is an integer number (7699071).

Almost surely, 2^30685229 is an apocalyptic number.

It is an amenable number.

30685229 is a deficient number, since it is larger than the sum of its proper divisors (111055).

30685229 is a wasteful number, since it uses less digits than its factorization.

30685229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111054.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 30685229 is about 5539.4249701571. The cubic root of 30685229 is about 313.0712036085.

The spelling of 30685229 in words is "thirty million, six hundred eighty-five thousand, two hundred twenty-nine".