133405421305 has 16 divisors (see below), whose sum is σ = 172863084240. Its totient is φ = 98250640128.

The previous prime is 133405421267. The next prime is 133405421311. The reversal of 133405421305 is 503124504331.

It can be written as a sum of positive squares in 8 ways, for example, as 2025270009 + 131380151296 = 45003^2 + 362464^2 .

It is a cyclic number.

It is not a de Polignac number, because 133405421305 - 2¹⁵ = 133405388537 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 2726950 + ... + 2775439.

It is an arithmetic number, because the mean of its divisors is an integer number (10803942765).

Almost surely, 2^133405421305 is an apocalyptic number.

It is an amenable number.

133405421305 is a deficient number, since it is larger than the sum of its proper divisors (39457662935).

133405421305 is a wasteful number, since it uses less digits than its factorization.

133405421305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5502780.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 133405421305 its reverse (503124504331), we get a palindrome (636529925636).

The spelling of 133405421305 in words is "one hundred thirty-three billion, four hundred five million, four hundred twenty-one thousand, three hundred five".