99860225 has 24 divisors (see below), whose sum is σ = 128708280. Its totient is φ = 76792320.

The previous prime is 99860221. The next prime is 99860231. The reversal of 99860225 is 52206899.

It can be written as a sum of positive squares in 12 ways, for example, as 47789569 + 52070656 = 6913^2 + 7216^2 .

It is not a de Polignac number, because 99860225 - 2² = 99860221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99860221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81719 + ... + 82931.

It is an arithmetic number, because the mean of its divisors is an integer number (5362845).

Almost surely, 2^99860225 is an apocalyptic number.

It is an amenable number.

99860225 is a deficient number, since it is larger than the sum of its proper divisors (28848055).

99860225 is a wasteful number, since it uses less digits than its factorization.

99860225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349 (or 1344 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 99860225 is about 9993.0088061604. The cubic root of 99860225 is about 463.9425231644.

The spelling of 99860225 in words is "ninety-nine million, eight hundred sixty thousand, two hundred twenty-five".