205213687162 has 64 divisors (see below), whose sum is σ = 349258791168. Its totient is φ = 89614336000.

The previous prime is 205213687141. The next prime is 205213687169. The reversal of 205213687162 is 261786312502.

It is a super-2 number, since 2×205213687162² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (205213687169) 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 31 ways as a sum of consecutive naturals, for example, 77937798 + ... + 77940430.

It is an arithmetic number, because the mean of its divisors is an integer number (5457168612).

Almost surely, 2^205213687162 is an apocalyptic number.

205213687162 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

205213687162 is a deficient number, since it is larger than the sum of its proper divisors (144045104006).

205213687162 is a wasteful number, since it uses less digits than its factorization.

205213687162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3975.

The product of its (nonzero) digits is 241920, while the sum is 43.

Adding to 205213687162 its reverse (261786312502), we get a palindrome (466999999664).

The spelling of 205213687162 in words is "two hundred five billion, two hundred thirteen million, six hundred eighty-seven thousand, one hundred sixty-two".