30213149 has 4 divisors (see below), whose sum is σ = 30480636. Its totient is φ = 29945664.

The previous prime is 30213143. The next prime is 30213163. The reversal of 30213149 is 94131203.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4761124 + 25452025 = 2182^2 + 5045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30213149 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 (30213143) 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 3 ways as a sum of consecutive naturals, for example, 133574 + ... + 133799.

It is an arithmetic number, because the mean of its divisors is an integer number (7620159).

Almost surely, 2^30213149 is an apocalyptic number.

It is an amenable number.

30213149 is a deficient number, since it is larger than the sum of its proper divisors (267487).

30213149 is a wasteful number, since it uses less digits than its factorization.

30213149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267486.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 30213149 is about 5496.6488881863. The cubic root of 30213149 is about 311.4574073904.

The spelling of 30213149 in words is "thirty million, two hundred thirteen thousand, one hundred forty-nine".