194247853225 has 6 divisors (see below), whose sum is σ = 240867338030. Its totient is φ = 155398282560.

The previous prime is 194247853193. The next prime is 194247853231. The reversal of 194247853225 is 522358742491.

It can be written as a sum of positive squares in 3 ways, for example, as 27407464704 + 166840388521 = 165552^2 + 408461^2 .

It is not a de Polignac number, because 194247853225 - 2⁵ = 194247853193 is a prime.

It is a super-2 number, since 2×194247853225² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3884957040 + ... + 3884957089.

Almost surely, 2^194247853225 is an apocalyptic number.

It is an amenable number.

194247853225 is a deficient number, since it is larger than the sum of its proper divisors (46619484805).

194247853225 is an equidigital number, since it uses as much as digits as its factorization.

194247853225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7769914139 (or 7769914134 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 52.

The spelling of 194247853225 in words is "one hundred ninety-four billion, two hundred forty-seven million, eight hundred fifty-three thousand, two hundred twenty-five".