199999525 has 12 divisors (see below), whose sum is σ = 270545184. Its totient is φ = 145454000.

The previous prime is 199999483. The next prime is 199999589. The reversal of 199999525 is 525999991.

199999525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 199999525 - 2¹⁵ = 199966757 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 199999525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 363361 + ... + 363910.

It is an arithmetic number, because the mean of its divisors is an integer number (22545432).

Almost surely, 2^199999525 is an apocalyptic number.

It is an amenable number.

199999525 is a deficient number, since it is larger than the sum of its proper divisors (70545659).

199999525 is a wasteful number, since it uses less digits than its factorization.

199999525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727292 (or 727287 counting only the distinct ones).

The product of its digits is 2952450, while the sum is 58.

The square root of 199999525 is about 14142.1188299349. The cubic root of 199999525 is about 584.8030846727.

The spelling of 199999525 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, five hundred twenty-five".