201081287 has 24 divisors (see below), whose sum is σ = 238605312. Its totient is φ = 167932800.

The previous prime is 201081281. The next prime is 201081319. The reversal of 201081287 is 782180102.

It is not a de Polignac number, because 201081287 - 2²⁰ = 200032711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201081281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135962 + ... + 137432.

It is an arithmetic number, because the mean of its divisors is an integer number (9941888).

Almost surely, 2^201081287 is an apocalyptic number.

201081287 is a deficient number, since it is larger than the sum of its proper divisors (37524025).

201081287 is a wasteful number, since it uses less digits than its factorization.

201081287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559 (or 1542 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 201081287 is about 14180.3133604304. The cubic root of 201081287 is about 585.8555548341.

The spelling of 201081287 in words is "two hundred one million, eighty-one thousand, two hundred eighty-seven".