30505206 has 16 divisors (see below), whose sum is σ = 61113024. Its totient is φ = 10151304.

The previous prime is 30505169. The next prime is 30505213. The reversal of 30505206 is 60250503.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96 + ... + 7811.

It is an arithmetic number, because the mean of its divisors is an integer number (3819564).

Almost surely, 2^30505206 is an apocalyptic number.

30505206 is an abundant number, since it is smaller than the sum of its proper divisors (30607818).

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

30505206 is a wasteful number, since it uses less digits than its factorization.

30505206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8555.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 30505206 is about 5523.1518175766. The cubic root of 30505206 is about 312.4577641052.

Adding to 30505206 its reverse (60250503), we get a palindrome (90755709).

It can be divided in two parts, 3050 and 5206, that added together give a triangular number (8256 = T₁₂₈).

The spelling of 30505206 in words is "thirty million, five hundred five thousand, two hundred six".