219440718025 has 27 divisors (see below), whose sum is σ = 287239894023. Its totient is φ = 166279237200.

The previous prime is 219440717981. The next prime is 219440718047. The reversal of 219440718025 is 520817044912.

The square root of 219440718025 is 468445.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 78998658489 + 140442059536 = 281067^2 + 374756^2 .

It is not a de Polignac number, because 219440718025 - 2²⁵ = 219407163593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 44499810 + ... + 44504740.

Almost surely, 2^219440718025 is an apocalyptic number.

219440718025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

219440718025 is the 468445-th square number.

219440718025 is the 234223-rd centered octagonal number.

It is an amenable number.

219440718025 is a deficient number, since it is larger than the sum of its proper divisors (67799175998).

219440718025 is an frugal number, since it uses more digits than its factorization.

219440718025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9910 (or 4955 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 219440718025 in words is "two hundred nineteen billion, four hundred forty million, seven hundred eighteen thousand, twenty-five".