30220081 has 2 divisors, whose sum is σ = 30220082. Its totient is φ = 30220080.

The previous prime is 30220079. The next prime is 30220093. The reversal of 30220081 is 18002203.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19722481 + 10497600 = 4441^2 + 3240^2 .

It is a cyclic number.

It is not a de Polignac number, because 30220081 - 2¹ = 30220079 is a prime.

It is a super-2 number, since 2×30220081² = 1826506591293122, which contains 22 as substring.

Together with 30220079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (30220061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15110040 + 15110041.

It is an arithmetic number, because the mean of its divisors is an integer number (15110041).

Almost surely, 2^30220081 is an apocalyptic number.

It is an amenable number.

30220081 is a deficient number, since it is larger than the sum of its proper divisors (1).

30220081 is an equidigital number, since it uses as much as digits as its factorization.

30220081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 30220081 is about 5497.2794180394. The cubic root of 30220081 is about 311.4812254710.

Adding to 30220081 its reverse (18002203), we get a palindrome (48222284).

The spelling of 30220081 in words is "thirty million, two hundred twenty thousand, eighty-one".