201286431169 has 4 divisors (see below), whose sum is σ = 201287394180. Its totient is φ = 201285468160.

The previous prime is 201286431127. The next prime is 201286431197. The reversal of 201286431169 is 961134682102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 48229430544 + 153057000625 = 219612^2 + 391225^2 .

It is a cyclic number.

It is not a de Polignac number, because 201286431169 - 2²³ = 201278042561 is a prime.

It is a super-2 number, since 2×201286431169² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201286431469) 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, 21472 + ... + 634849.

It is an arithmetic number, because the mean of its divisors is an integer number (50321848545).

Almost surely, 2^201286431169 is an apocalyptic number.

It is an amenable number.

201286431169 is a deficient number, since it is larger than the sum of its proper divisors (963011).

201286431169 is an equidigital number, since it uses as much as digits as its factorization.

201286431169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963010.

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 201286431169 in words is "two hundred one billion, two hundred eighty-six million, four hundred thirty-one thousand, one hundred sixty-nine".