205232321453 has 16 divisors (see below), whose sum is σ = 216686482560. Its totient is φ = 193998072576.

The previous prime is 205232321443. The next prime is 205232321471. The reversal of 205232321453 is 354123232502.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205232321453 is a prime.

It is a super-3 number, since 3×205232321453³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205232321423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 904601 + ... + 1108497.

It is an arithmetic number, because the mean of its divisors is an integer number (13542905160).

Almost surely, 2^205232321453 is an apocalyptic number.

205232321453 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

205232321453 is a deficient number, since it is larger than the sum of its proper divisors (11454161107).

205232321453 is a wasteful number, since it uses less digits than its factorization.

205232321453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204436.

The product of its (nonzero) digits is 43200, while the sum is 32.

Adding to 205232321453 its reverse (354123232502), we get a palindrome (559355553955).

The spelling of 205232321453 in words is "two hundred five billion, two hundred thirty-two million, three hundred twenty-one thousand, four hundred fifty-three".