30225661 has 2 divisors, whose sum is σ = 30225662. Its totient is φ = 30225660.

The previous prime is 30225649. The next prime is 30225667. The reversal of 30225661 is 16652203.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17480761 + 12744900 = 4181^2 + 3570^2 .

It is an emirp because it is prime and its reverse (16652203) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30225661 - 2⁹ = 30225149 is a prime.

It is equal to p_1871044 and since 30225661 and 1871044 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30225667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15112830 + 15112831.

It is an arithmetic number, because the mean of its divisors is an integer number (15112831).

Almost surely, 2^30225661 is an apocalyptic number.

It is an amenable number.

30225661 is a deficient number, since it is larger than the sum of its proper divisors (1).

30225661 is an equidigital number, since it uses as much as digits as its factorization.

30225661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 30225661 is about 5497.7869183882. The cubic root of 30225661 is about 311.5003954866.

Adding to 30225661 its reverse (16652203), we get a palindrome (46877864).

The spelling of 30225661 in words is "thirty million, two hundred twenty-five thousand, six hundred sixty-one".