30224781 has 6 divisors (see below), whose sum is σ = 43658030. Its totient is φ = 20149848.

The previous prime is 30224731. The next prime is 30224791. The reversal of 30224781 is 18742203.

It can be written as a sum of positive squares in only one way, i.e., 30140100 + 84681 = 5490^2 + 291^2 .

It is not a de Polignac number, because 30224781 - 2¹⁴ = 30208397 is a prime.

It is a super-2 number, since 2×30224781² = 1827074772995922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30224731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1679146 + ... + 1679163.

Almost surely, 2^30224781 is an apocalyptic number.

It is an amenable number.

30224781 is a deficient number, since it is larger than the sum of its proper divisors (13433249).

30224781 is a wasteful number, since it uses less digits than its factorization.

30224781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3358315 (or 3358312 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 30224781 is about 5497.7068856024. The cubic root of 30224781 is about 311.4973724150.

Adding to 30224781 its reverse (18742203), we get a palindrome (48966984).

The spelling of 30224781 in words is "thirty million, two hundred twenty-four thousand, seven hundred eighty-one".