205411001353240 has 16 divisors (see below), whose sum is σ = 462174753044880. Its totient is φ = 82164400541280.

The previous prime is 205411001353139. The next prime is 205411001353297. The reversal of 205411001353240 is 42353100114502.

It is a super-2 number, since 2×205411001353240² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2567637516876 + ... + 2567637516955.

It is an arithmetic number, because the mean of its divisors is an integer number (28885922065305).

Almost surely, 2^{205411001353240} is an apocalyptic number.

205411001353240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205411001353240 is an abundant number, since it is smaller than the sum of its proper divisors (256763751691640).

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

205411001353240 is a wasteful number, since it uses less digits than its factorization.

205411001353240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5135275033842 (or 5135275033838 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 205411001353240 its reverse (42353100114502), we get a palindrome (247764101467742).

The spelling of 205411001353240 in words is "two hundred five trillion, four hundred eleven billion, one million, three hundred fifty-three thousand, two hundred forty".