201287719801 has 27 divisors (see below), whose sum is σ = 236755049349. Its totient is φ = 170634537528.

The previous prime is 201287719783. The next prime is 201287719811. The reversal of 201287719801 is 108917782102.

The square root of 201287719801 is 448651.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 201287719801 - 2⁷ = 201287719673 is a prime.

It is a super-2 number, since 2×201287719801² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201287719811) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 336039300 + ... + 336039898.

Almost surely, 2^201287719801 is an apocalyptic number.

201287719801 is the 448651-st square number.

201287719801 is the 224326-th centered octagonal number.

It is an amenable number.

201287719801 is a deficient number, since it is larger than the sum of its proper divisors (35467329548).

201287719801 is an frugal number, since it uses more digits than its factorization.

201287719801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426 (or 713 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 46.

The spelling of 201287719801 in words is "two hundred one billion, two hundred eighty-seven million, seven hundred nineteen thousand, eight hundred one".