30217081 has 2 divisors, whose sum is σ = 30217082. Its totient is φ = 30217080.

The previous prime is 30217073. The next prime is 30217091. The reversal of 30217081 is 18071203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27657081 + 2560000 = 5259^2 + 1600^2 .

It is a cyclic number.

It is not a de Polignac number, because 30217081 - 2³ = 30217073 is a prime.

It is a super-2 number, since 2×30217081² = 1826143968321122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30217091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15108540 + 15108541.

It is an arithmetic number, because the mean of its divisors is an integer number (15108541).

Almost surely, 2^30217081 is an apocalyptic number.

It is an amenable number.

30217081 is a deficient number, since it is larger than the sum of its proper divisors (1).

30217081 is an equidigital number, since it uses as much as digits as its factorization.

30217081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 30217081 is about 5497.0065490228. The cubic root of 30217081 is about 311.4709180355.

Adding to 30217081 its reverse (18071203), we get a palindrome (48288284).

The spelling of 30217081 in words is "thirty million, two hundred seventeen thousand, eighty-one".