201894281 has 4 divisors (see below), whose sum is σ = 206189952. Its totient is φ = 197598612.

The previous prime is 201894271. The next prime is 201894347. The reversal of 201894281 is 182498102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201894281 is a prime.

It is a super-2 number, since 2×201894281² = 81522601401013922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (201894211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2147765 + ... + 2147858.

It is an arithmetic number, because the mean of its divisors is an integer number (51547488).

Almost surely, 2^201894281 is an apocalyptic number.

It is an amenable number.

201894281 is a deficient number, since it is larger than the sum of its proper divisors (4295671).

201894281 is an equidigital number, since it uses as much as digits as its factorization.

201894281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4295670.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 201894281 is about 14208.9507353640. The cubic root of 201894281 is about 586.6440528402.

The spelling of 201894281 in words is "two hundred one million, eight hundred ninety-four thousand, two hundred eighty-one".