219140945 has 8 divisors (see below), whose sum is σ = 265680744. Its totient is φ = 173505024.

The previous prime is 219140917. The next prime is 219140951. The reversal of 219140945 is 549041912.

It can be written as a sum of positive squares in 4 ways, for example, as 60481729 + 158659216 = 7777^2 + 12596^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 219140945 - 2⁸ = 219140689 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225434 + ... + 226403.

It is an arithmetic number, because the mean of its divisors is an integer number (33210093).

Almost surely, 2^219140945 is an apocalyptic number.

It is an amenable number.

219140945 is a deficient number, since it is larger than the sum of its proper divisors (46539799).

219140945 is an equidigital number, since it uses as much as digits as its factorization.

219140945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451939.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 219140945 is about 14803.4099112333. The cubic root of 219140945 is about 602.8942983530.

The spelling of 219140945 in words is "two hundred nineteen million, one hundred forty thousand, nine hundred forty-five".