422471509 has 2 divisors, whose sum is σ = 422471510. Its totient is φ = 422471508.

The previous prime is 422471453. The next prime is 422471549. The reversal of 422471509 is 905174224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 372104100 + 50367409 = 19290^2 + 7097^2 .

It is a cyclic number.

It is not a de Polignac number, because 422471509 - 2¹⁹ = 421947221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422471549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211235754 + 211235755.

It is an arithmetic number, because the mean of its divisors is an integer number (211235755).

Almost surely, 2^422471509 is an apocalyptic number.

It is an amenable number.

422471509 is a deficient number, since it is larger than the sum of its proper divisors (1).

422471509 is an equidigital number, since it uses as much as digits as its factorization.

422471509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 422471509 is about 20554.1117297732. Note that the first 3 decimals coincide. The cubic root of 422471509 is about 750.3533203417.

The spelling of 422471509 in words is "four hundred twenty-two million, four hundred seventy-one thousand, five hundred nine".