30215205 has 48 divisors (see below), whose sum is σ = 56070144. Its totient is φ = 14999040.

The previous prime is 30215201. The next prime is 30215221. The reversal of 30215205 is 50251203.

It is a happy number.

It is not a de Polignac number, because 30215205 - 2² = 30215201 is a prime.

It is a super-2 number, since 2×30215205² = 1825917226384050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30215201) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 97000 + ... + 97310.

It is an arithmetic number, because the mean of its divisors is an integer number (1168128).

Almost surely, 2^30215205 is an apocalyptic number.

It is an amenable number.

30215205 is a deficient number, since it is larger than the sum of its proper divisors (25854939).

30215205 is a wasteful number, since it uses less digits than its factorization.

30215205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466 (or 463 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 30215205 is about 5496.8359080475. The cubic root of 30215205 is about 311.4644721059.

Adding to 30215205 its reverse (50251203), we get a palindrome (80466408).

The spelling of 30215205 in words is "thirty million, two hundred fifteen thousand, two hundred five".