219853143225 has 27 divisors (see below), whose sum is σ = 393794005423. Its totient is φ = 117251258640.

The previous prime is 219853143217. The next prime is 219853143227. The reversal of 219853143225 is 522341358912.

The square root of 219853143225 is 468885.

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

219853143225 is a `hidden beast` number, since 2 + 1 + 9 + 8 + 5 + 314 + 322 + 5 = 666.

It can be written as a sum of positive squares in only one way, i.e., 79147131561 + 140706011664 = 281331^2 + 375108^2 .

It is not a de Polignac number, because 219853143225 - 2³ = 219853143217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (219853143227) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 7017646 + ... + 7048904.

Almost surely, 2^219853143225 is an apocalyptic number.

219853143225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

219853143225 is the 468885-th square number.

219853143225 is the 234443-rd centered octagonal number.

It is an amenable number.

219853143225 is a deficient number, since it is larger than the sum of its proper divisors (173940862198).

219853143225 is an frugal number, since it uses more digits than its factorization.

219853143225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62534 (or 31267 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The spelling of 219853143225 in words is "two hundred nineteen billion, eight hundred fifty-three million, one hundred forty-three thousand, two hundred twenty-five".