30221694 has 32 divisors (see below), whose sum is σ = 67415040. Its totient is φ = 10035576.

The previous prime is 30221693. The next prime is 30221707. The reversal of 30221694 is 49612203.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30221693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15667 + ... + 17489.

It is an arithmetic number, because the mean of its divisors is an integer number (2106720).

Almost surely, 2^30221694 is an apocalyptic number.

30221694 is an abundant number, since it is smaller than the sum of its proper divisors (37193346).

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

30221694 is a wasteful number, since it uses less digits than its factorization.

30221694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2141 (or 2135 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 30221694 is about 5497.4261250152. The cubic root of 30221694 is about 311.4867671534.

Adding to 30221694 its reverse (49612203), we get a palindrome (79833897).

The spelling of 30221694 in words is "thirty million, two hundred twenty-one thousand, six hundred ninety-four".