215048609 has 2 divisors, whose sum is σ = 215048610. Its totient is φ = 215048608.

The previous prime is 215048579. The next prime is 215048611. The reversal of 215048609 is 906840512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202777600 + 12271009 = 14240^2 + 3503^2 .

It is a cyclic number.

It is not a de Polignac number, because 215048609 - 2¹⁶ = 214983073 is a prime.

Together with 215048611, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_11864834 and since 215048609 and 11864834 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (215048629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107524304 + 107524305.

It is an arithmetic number, because the mean of its divisors is an integer number (107524305).

Almost surely, 2^215048609 is an apocalyptic number.

It is an amenable number.

215048609 is a deficient number, since it is larger than the sum of its proper divisors (1).

215048609 is an equidigital number, since it uses as much as digits as its factorization.

215048609 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 35.

The square root of 215048609 is about 14664.5357580798. The cubic root of 215048609 is about 599.1177858736.

The spelling of 215048609 in words is "two hundred fifteen million, forty-eight thousand, six hundred nine".