30421224 has 32 divisors (see below), whose sum is σ = 84504000. Its totient is φ = 10140336.

The previous prime is 30421207. The next prime is 30421247. The reversal of 30421224 is 42212403.

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

It is a junction number, because it is equal to n+sod(n) for n = 30421197 and 30421206.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70204 + ... + 70635.

It is an arithmetic number, because the mean of its divisors is an integer number (2640750).

Almost surely, 2^30421224 is an apocalyptic number.

It is an amenable number.

30421224 is an abundant number, since it is smaller than the sum of its proper divisors (54082776).

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

30421224 is a wasteful number, since it uses less digits than its factorization.

30421224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140854 (or 140844 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 30421224 is about 5515.5438535107. The cubic root of 30421224 is about 312.1707645079.

Adding to 30421224 its reverse (42212403), we get a palindrome (72633627).

It can be divided in two parts, 304 and 21224, that added together give a triangular number (21528 = T₂₀₇).

The spelling of 30421224 in words is "thirty million, four hundred twenty-one thousand, two hundred twenty-four".