201211185582 has 48 divisors (see below), whose sum is σ = 480933825840. Its totient is φ = 60287990400.

The previous prime is 201211185577. The next prime is 201211185611. The reversal of 201211185582 is 285581112102.

It is a super-3 number, since 3×201211185582³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5691469 + ... + 5726712.

It is an arithmetic number, because the mean of its divisors is an integer number (10019454705).

Almost surely, 2^201211185582 is an apocalyptic number.

201211185582 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

201211185582 is an abundant number, since it is smaller than the sum of its proper divisors (279722640258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201211185582 is a wasteful number, since it uses less digits than its factorization.

201211185582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11418289 (or 11418286 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 36.

Adding to 201211185582 its reverse (285581112102), we get a palindrome (486792297684).

The spelling of 201211185582 in words is "two hundred one billion, two hundred eleven million, one hundred eighty-five thousand, five hundred eighty-two".