219970161 has 12 divisors (see below), whose sum is σ = 329502992. Its totient is φ = 146646612.

The previous prime is 219970159. The next prime is 219970181. The reversal of 219970161 is 161079912.

It is not a de Polignac number, because 219970161 - 2¹ = 219970159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (219970111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 452371 + ... + 452856.

Almost surely, 2^219970161 is an apocalyptic number.

It is an amenable number.

219970161 is a deficient number, since it is larger than the sum of its proper divisors (109532831).

219970161 is an frugal number, since it uses more digits than its factorization.

219970161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905242 (or 905230 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 36.

The square root of 219970161 is about 14831.3910675971. The cubic root of 219970161 is about 603.6537796585.

The spelling of 219970161 in words is "two hundred nineteen million, nine hundred seventy thousand, one hundred sixty-one".