205413501331 has 4 divisors (see below), whose sum is σ = 214344523152. Its totient is φ = 196482479512.

The previous prime is 205413501323. The next prime is 205413501401. The reversal of 205413501331 is 133105314502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133105314502 = 2 ⋅66552657251.

It is a cyclic number.

It is not a de Polignac number, because 205413501331 - 2³ = 205413501323 is a prime.

It is a super-2 number, since 2×205413501331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 205413501331.

It is not an unprimeable number, because it can be changed into a prime (205413501131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4465510876 + ... + 4465510921.

It is an arithmetic number, because the mean of its divisors is an integer number (53586130788).

Almost surely, 2^205413501331 is an apocalyptic number.

205413501331 is a deficient number, since it is larger than the sum of its proper divisors (8931021821).

205413501331 is an equidigital number, since it uses as much as digits as its factorization.

205413501331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8931021820.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 205413501331 its reverse (133105314502), we get a palindrome (338518815833).

The spelling of 205413501331 in words is "two hundred five billion, four hundred thirteen million, five hundred one thousand, three hundred thirty-one".