205215511001226 has 32 divisors (see below), whose sum is σ = 447767387859456. Its totient is φ = 62183121990000.

The previous prime is 205215511001219. The next prime is 205215511001231. The reversal of 205215511001226 is 622100115512502.

It is a super-2 number, since 2×205215511001226² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 83694700 + ... + 86111751.

It is an arithmetic number, because the mean of its divisors is an integer number (13992730870608).

Almost surely, 2^{205215511001226} is an apocalyptic number.

205215511001226 is an abundant number, since it is smaller than the sum of its proper divisors (242551876858230).

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

205215511001226 is a wasteful number, since it uses less digits than its factorization.

205215511001226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169824778.

The product of its (nonzero) digits is 12000, while the sum is 33.

Adding to 205215511001226 its reverse (622100115512502), we get a palindrome (827315626513728).

The spelling of 205215511001226 in words is "two hundred five trillion, two hundred fifteen billion, five hundred eleven million, one thousand, two hundred twenty-six".