216450019 has 2 divisors, whose sum is σ = 216450020. Its totient is φ = 216450018.

The previous prime is 216450011. The next prime is 216450061. The reversal of 216450019 is 910054612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216450019 - 2³ = 216450011 is a prime.

It is a super-2 number, since 2×216450019² = 93701221450200722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (216450011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108225009 + 108225010.

It is an arithmetic number, because the mean of its divisors is an integer number (108225010).

Almost surely, 2^216450019 is an apocalyptic number.

216450019 is a deficient number, since it is larger than the sum of its proper divisors (1).

216450019 is an equidigital number, since it uses as much as digits as its factorization.

216450019 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 28.

The square root of 216450019 is about 14712.2404480079. The cubic root of 216450019 is about 600.4163952174.

The spelling of 216450019 in words is "two hundred sixteen million, four hundred fifty thousand, nineteen".