30221131 has 4 divisors (see below), whose sum is σ = 30923992. Its totient is φ = 29518272.

The previous prime is 30221123. The next prime is 30221137. The reversal of 30221131 is 13112203.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30221131 - 2³ = 30221123 is a prime.

It is a super-2 number, since 2×30221131² = 1826633517838322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30221137) 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 3 ways as a sum of consecutive naturals, for example, 351366 + ... + 351451.

It is an arithmetic number, because the mean of its divisors is an integer number (7730998).

Almost surely, 2^30221131 is an apocalyptic number.

30221131 is a deficient number, since it is larger than the sum of its proper divisors (702861).

30221131 is an equidigital number, since it uses as much as digits as its factorization.

30221131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702860.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 30221131 is about 5497.3749189954. The cubic root of 30221131 is about 311.4848329122.

Adding to 30221131 its reverse (13112203), we get a palindrome (43333334).

The spelling of 30221131 in words is "thirty million, two hundred twenty-one thousand, one hundred thirty-one".