30221442 has 24 divisors (see below), whose sum is σ = 65919360. Its totient is φ = 10006200.

The previous prime is 30221441. The next prime is 30221447. The reversal of 30221442 is 24412203.

30221442 is a `hidden beast` number, since 3 + 0 + 221 + 442 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (30221441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2842 + ... + 8277.

It is an arithmetic number, because the mean of its divisors is an integer number (2746640).

Almost surely, 2^30221442 is an apocalyptic number.

30221442 is an abundant number, since it is smaller than the sum of its proper divisors (35697918).

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

30221442 is a wasteful number, since it uses less digits than its factorization.

30221442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11278 (or 11275 counting only the distinct ones).

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

The square root of 30221442 is about 5497.4032051506. The cubic root of 30221442 is about 311.4859013859.

Adding to 30221442 its reverse (24412203), we get a palindrome (54633645).

The spelling of 30221442 in words is "thirty million, two hundred twenty-one thousand, four hundred forty-two".