30213144 has 96 divisors (see below), whose sum is σ = 89107200. Its totient is φ = 9247680.

The previous prime is 30213143. The next prime is 30213163. The reversal of 30213144 is 44131203.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 158089 + ... + 158279.

It is an arithmetic number, because the mean of its divisors is an integer number (928200).

Almost surely, 2^30213144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30213144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44553600).

30213144 is an abundant number, since it is smaller than the sum of its proper divisors (58894056).

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

30213144 is a wasteful number, since it uses less digits than its factorization.

30213144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 30213144 is about 5496.6484333637. The cubic root of 30213144 is about 311.4573902093.

Adding to 30213144 its reverse (44131203), we get a palindrome (74344347).

The spelling of 30213144 in words is "thirty million, two hundred thirteen thousand, one hundred forty-four".