30533144 has 16 divisors (see below), whose sum is σ = 59739120. Its totient is φ = 14602720.

The previous prime is 30533119. The next prime is 30533161. The reversal of 30533144 is 44133503.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82787 + ... + 83154.

It is an arithmetic number, because the mean of its divisors is an integer number (3733695).

Almost surely, 2^30533144 is an apocalyptic number.

It is an amenable number.

30533144 is a deficient number, since it is larger than the sum of its proper divisors (29205976).

30533144 is a wasteful number, since it uses less digits than its factorization.

30533144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165970 (or 165966 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 30533144 is about 5525.6804105920. The cubic root of 30533144 is about 312.5531224891.

Adding to 30533144 its reverse (44133503), we get a palindrome (74666647).

The spelling of 30533144 in words is "thirty million, five hundred thirty-three thousand, one hundred forty-four".