201894155 has 8 divisors (see below), whose sum is σ = 242377152. Its totient is φ = 161445888.

The previous prime is 201894139. The next prime is 201894179. The reversal of 201894155 is 551498102.

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 201894155 - 2⁴ = 201894139 is a prime.

It is a super-2 number, since 2×201894155² = 81522499646328050, which contains 22 as substring.

It is a Duffinian 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, 6539 + ... + 21131.

It is an arithmetic number, because the mean of its divisors is an integer number (30297144).

Almost surely, 2^201894155 is an apocalyptic number.

201894155 is a deficient number, since it is larger than the sum of its proper divisors (40482997).

201894155 is a wasteful number, since it uses less digits than its factorization.

201894155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17365.

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 201894155 is about 14208.9463015383. The cubic root of 201894155 is about 586.6439308008.

The spelling of 201894155 in words is "two hundred one million, eight hundred ninety-four thousand, one hundred fifty-five".