30221642 has 16 divisors (see below), whose sum is σ = 49937472. Its totient is φ = 13602720.

The previous prime is 30221627. The next prime is 30221663. The reversal of 30221642 is 24612203.

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, 4403 + ... + 8934.

It is an arithmetic number, because the mean of its divisors is an integer number (3121092).

Almost surely, 2^30221642 is an apocalyptic number.

30221642 is a deficient number, since it is larger than the sum of its proper divisors (19715830).

30221642 is a wasteful number, since it uses less digits than its factorization.

30221642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13453.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 30221642 is about 5497.4213955272. The cubic root of 30221642 is about 311.4865885034.

Adding to 30221642 its reverse (24612203), we get a palindrome (54833845).

It can be divided in two parts, 3022 and 1642, that added together give a palindrome (4664).

The spelling of 30221642 in words is "thirty million, two hundred twenty-one thousand, six hundred forty-two".