30531224 has 16 divisors (see below), whose sum is σ = 58642920. Its totient is φ = 14893120.

The previous prime is 30531223. The next prime is 30531239. The reversal of 30531224 is 42213503.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 30531196 and 30531205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30531223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46214 + ... + 46869.

Almost surely, 2^30531224 is an apocalyptic number.

It is an amenable number.

30531224 is a deficient number, since it is larger than the sum of its proper divisors (28111696).

30531224 is a wasteful number, since it uses less digits than its factorization.

30531224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93130 (or 93126 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 30531224 is about 5525.5066736002. The cubic root of 30531224 is about 312.5465709793.

Adding to 30531224 its reverse (42213503), we get a palindrome (72744727).

The spelling of 30531224 in words is "thirty million, five hundred thirty-one thousand, two hundred twenty-four".