30221742 has 32 divisors (see below), whose sum is σ = 63889920. Its totient is φ = 9504000.

The previous prime is 30221729. The next prime is 30221753. The reversal of 30221742 is 24712203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39867 + ... + 40617.

It is an arithmetic number, because the mean of its divisors is an integer number (1996560).

Almost surely, 2^30221742 is an apocalyptic number.

30221742 is an abundant number, since it is smaller than the sum of its proper divisors (33668178).

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

30221742 is a wasteful number, since it uses less digits than its factorization.

30221742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 30221742 is about 5497.4304906929. The cubic root of 30221742 is about 311.4869320610.

Adding to 30221742 its reverse (24712203), we get a palindrome (54933945).

The spelling of 30221742 in words is "thirty million, two hundred twenty-one thousand, seven hundred forty-two".