220430421509 has 2 divisors, whose sum is σ = 220430421510. Its totient is φ = 220430421508.

The previous prime is 220430421397. The next prime is 220430421517. The reversal of 220430421509 is 905124034022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121612612900 + 98817808609 = 348730^2 + 314353^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220430421509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220430421559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110215210754 + 110215210755.

It is an arithmetic number, because the mean of its divisors is an integer number (110215210755).

Almost surely, 2^220430421509 is an apocalyptic number.

It is an amenable number.

220430421509 is a deficient number, since it is larger than the sum of its proper divisors (1).

220430421509 is an equidigital number, since it uses as much as digits as its factorization.

220430421509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 220430421509 in words is "two hundred twenty billion, four hundred thirty million, four hundred twenty-one thousand, five hundred nine".