30212945 has 16 divisors (see below), whose sum is σ = 43616640. Its totient is φ = 19626624.

The previous prime is 30212939. The next prime is 30212957. The reversal of 30212945 is 54921203.

It is a cyclic number.

It is not a de Polignac number, because 30212945 - 2⁴ = 30212929 is a prime.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 22052 + ... + 23381.

It is an arithmetic number, because the mean of its divisors is an integer number (2726040).

Almost surely, 2^30212945 is an apocalyptic number.

30212945 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30212945 is a deficient number, since it is larger than the sum of its proper divisors (13403695).

30212945 is a wasteful number, since it uses less digits than its factorization.

30212945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45464.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 30212945 is about 5496.6303313940. The cubic root of 30212945 is about 311.4567063992.

The spelling of 30212945 in words is "thirty million, two hundred twelve thousand, nine hundred forty-five".