202497191271 has 64 divisors (see below), whose sum is σ = 322639052800. Its totient is φ = 125144828928.

The previous prime is 202497191269. The next prime is 202497191287. The reversal of 202497191271 is 172191794202.

It is a happy number.

202497191271 is a `hidden beast` number, since 2 + 0 + 2 + 497 + 1 + 91 + 2 + 71 = 666.

It is not a de Polignac number, because 202497191271 - 2¹ = 202497191269 is a prime.

It is a super-2 number, since 2×202497191271² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202497191251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4734735 + ... + 4777311.

It is an arithmetic number, because the mean of its divisors is an integer number (5041235200).

Almost surely, 2^202497191271 is an apocalyptic number.

202497191271 is a deficient number, since it is larger than the sum of its proper divisors (120141861529).

202497191271 is a wasteful number, since it uses less digits than its factorization.

202497191271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42805 (or 42799 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The spelling of 202497191271 in words is "two hundred two billion, four hundred ninety-seven million, one hundred ninety-one thousand, two hundred seventy-one".