199575561 has 16 divisors (see below), whose sum is σ = 268272000. Its totient is φ = 131970048.

The previous prime is 199575559. The next prime is 199575587. The reversal of 199575561 is 165575991.

It is not a de Polignac number, because 199575561 - 2¹ = 199575559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199575561.

It is not an unprimeable number, because it can be changed into a prime (199579561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308140 + ... + 308786.

It is an arithmetic number, because the mean of its divisors is an integer number (16767000).

Almost surely, 2^199575561 is an apocalyptic number.

It is an amenable number.

199575561 is a deficient number, since it is larger than the sum of its proper divisors (68696439).

199575561 is a wasteful number, since it uses less digits than its factorization.

199575561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328.

The product of its digits is 425250, while the sum is 48.

The square root of 199575561 is about 14127.1214690042. The cubic root of 199575561 is about 584.3895655992.

The spelling of 199575561 in words is "one hundred ninety-nine million, five hundred seventy-five thousand, five hundred sixty-one".