30221541 has 24 divisors (see below), whose sum is σ = 50042304. Its totient is φ = 17216640.

The previous prime is 30221537. The next prime is 30221549. The reversal of 30221541 is 14512203.

It is not a de Polignac number, because 30221541 - 2² = 30221537 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30221549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30445 + ... + 31421.

It is an arithmetic number, because the mean of its divisors is an integer number (2085096).

Almost surely, 2^30221541 is an apocalyptic number.

It is an amenable number.

30221541 is a deficient number, since it is larger than the sum of its proper divisors (19820763).

30221541 is a wasteful number, since it uses less digits than its factorization.

30221541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481 (or 1478 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 30221541 is about 5497.4122093945. The cubic root of 30221541 is about 311.4862415094.

Adding to 30221541 its reverse (14512203), we get a palindrome (44733744).

The spelling of 30221541 in words is "thirty million, two hundred twenty-one thousand, five hundred forty-one".