205136412 has 48 divisors (see below), whose sum is σ = 523945632. Its totient is φ = 62081280.

The previous prime is 205136411. The next prime is 205136413. The reversal of 205136412 is 214631502.

It is an interprime number because it is at equal distance from previous prime (205136411) and next prime (205136413).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205136411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1263 + ... + 20294.

It is an arithmetic number, because the mean of its divisors is an integer number (10915534).

Almost surely, 2^205136412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205136412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261972816).

205136412 is an abundant number, since it is smaller than the sum of its proper divisors (318809220).

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

205136412 is a wasteful number, since it uses less digits than its factorization.

205136412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21638 (or 21636 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 205136412 is about 14322.5839847424. The cubic root of 205136412 is about 589.7676112463.

Adding to 205136412 its reverse (214631502), we get a palindrome (419767914).

The spelling of 205136412 in words is "two hundred five million, one hundred thirty-six thousand, four hundred twelve".