201998135 has 8 divisors (see below), whose sum is σ = 244897296. Its totient is φ = 159932160.

The previous prime is 201998117. The next prime is 201998161. The reversal of 201998135 is 531899102.

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

It is a de Polignac number, because none of the positive numbers 2^k-201998135 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207761 + ... + 208730.

It is an arithmetic number, because the mean of its divisors is an integer number (30612162).

Almost surely, 2^201998135 is an apocalyptic number.

201998135 is a deficient number, since it is larger than the sum of its proper divisors (42899161).

201998135 is an equidigital number, since it uses as much as digits as its factorization.

201998135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416593.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 201998135 is about 14212.6047929294. The cubic root of 201998135 is about 586.7446250927.

The spelling of 201998135 in words is "two hundred one million, nine hundred ninety-eight thousand, one hundred thirty-five".