205501340 has 96 divisors (see below), whose sum is σ = 500048640. Its totient is φ = 70156800.

The previous prime is 205501333. The next prime is 205501363. The reversal of 205501340 is 43105502.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 881864 + ... + 882096.

It is an arithmetic number, because the mean of its divisors is an integer number (5208840).

Almost surely, 2^205501340 is an apocalyptic number.

205501340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205501340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250024320).

205501340 is an abundant number, since it is smaller than the sum of its proper divisors (294547300).

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

205501340 is a wasteful number, since it uses less digits than its factorization.

205501340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483 (or 481 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 205501340 is about 14335.3179246224. The cubic root of 205501340 is about 590.1171269906.

Adding to 205501340 its reverse (43105502), we get a palindrome (248606842).

The spelling of 205501340 in words is "two hundred five million, five hundred one thousand, three hundred forty".