205401401133 has 4 divisors (see below), whose sum is σ = 273868534848. Its totient is φ = 136934267420.

The previous prime is 205401401099. The next prime is 205401401147. The reversal of 205401401133 is 331104104502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 205401401133 - 2⁸ = 205401400877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205401401033) 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, 34233566853 + ... + 34233566858.

It is an arithmetic number, because the mean of its divisors is an integer number (68467133712).

Almost surely, 2^205401401133 is an apocalyptic number.

It is an amenable number.

205401401133 is a deficient number, since it is larger than the sum of its proper divisors (68467133715).

205401401133 is an equidigital number, since it uses as much as digits as its factorization.

205401401133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68467133714.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 205401401133 its reverse (331104104502), we get a palindrome (536505505635).

The spelling of 205401401133 in words is "two hundred five billion, four hundred one million, four hundred one thousand, one hundred thirty-three".