305100421 has 2 divisors, whose sum is σ = 305100422. Its totient is φ = 305100420.

The previous prime is 305100391. The next prime is 305100431. The reversal of 305100421 is 124001503.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172528225 + 132572196 = 13135^2 + 11514^2 .

It is a cyclic number.

It is not a de Polignac number, because 305100421 - 2⁷ = 305100293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 305100395 and 305100404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (305100431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152550210 + 152550211.

It is an arithmetic number, because the mean of its divisors is an integer number (152550211).

Almost surely, 2^305100421 is an apocalyptic number.

It is an amenable number.

305100421 is a deficient number, since it is larger than the sum of its proper divisors (1).

305100421 is an equidigital number, since it uses as much as digits as its factorization.

305100421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 305100421 is about 17467.1240048269. The cubic root of 305100421 is about 673.2054176238.

Adding to 305100421 its reverse (124001503), we get a palindrome (429101924).

The spelling of 305100421 in words is "three hundred five million, one hundred thousand, four hundred twenty-one".