199161441 has 12 divisors (see below), whose sum is σ = 290911140. Its totient is φ = 131281920.

The previous prime is 199161437. The next prime is 199161463. The reversal of 199161441 is 144161991.

It can be written as a sum of positive squares in 2 ways, for example, as 61779600 + 137381841 = 7860^2 + 11721^2 .

It is not a de Polignac number, because 199161441 - 2² = 199161437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199161396 and 199161405.

It is not an unprimeable number, because it can be changed into a prime (199161041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123520 + ... + 125121.

It is an arithmetic number, because the mean of its divisors is an integer number (24242595).

Almost surely, 2^199161441 is an apocalyptic number.

It is an amenable number.

199161441 is a deficient number, since it is larger than the sum of its proper divisors (91749699).

199161441 is a wasteful number, since it uses less digits than its factorization.

199161441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248736 (or 248733 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 199161441 is about 14112.4569441327. The cubic root of 199161441 is about 583.9850822251.

The spelling of 199161441 in words is "one hundred ninety-nine million, one hundred sixty-one thousand, four hundred forty-one".