219497961 has 8 divisors (see below), whose sum is σ = 293028064. Its totient is φ = 146149920.

The previous prime is 219497951. The next prime is 219497983. The reversal of 219497961 is 169794912.

219497961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 219497961 - 2⁷ = 219497833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 219497961.

It is not an unprimeable number, because it can be changed into a prime (219497911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42676 + ... + 47541.

It is an arithmetic number, because the mean of its divisors is an integer number (36628508).

Almost surely, 2^219497961 is an apocalyptic number.

It is an amenable number.

219497961 is a deficient number, since it is larger than the sum of its proper divisors (73530103).

219497961 is an equidigital number, since it uses as much as digits as its factorization.

219497961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91031.

The product of its digits is 244944, while the sum is 48.

The square root of 219497961 is about 14815.4635769523. The cubic root of 219497961 is about 603.2215247841.

The spelling of 219497961 in words is "two hundred nineteen million, four hundred ninety-seven thousand, nine hundred sixty-one".