199631101 has 8 divisors (see below), whose sum is σ = 204087384. Its totient is φ = 195213120.

The previous prime is 199631083. The next prime is 199631147. The reversal of 199631101 is 101136991.

It can be written as a sum of positive squares in 4 ways, for example, as 45225625 + 154405476 = 6725^2 + 12426^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 199631101 - 2⁷ = 199630973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199631171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1095 + ... + 20011.

It is an arithmetic number, because the mean of its divisors is an integer number (25510923).

Almost surely, 2^199631101 is an apocalyptic number.

It is an amenable number.

199631101 is a deficient number, since it is larger than the sum of its proper divisors (4456283).

199631101 is a wasteful number, since it uses less digits than its factorization.

199631101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19151.

The product of its (nonzero) digits is 1458, while the sum is 31.

The square root of 199631101 is about 14129.0870547251. The cubic root of 199631101 is about 584.4437706096.

The spelling of 199631101 in words is "one hundred ninety-nine million, six hundred thirty-one thousand, one hundred one".