205221771150 has 96 divisors (see below), whose sum is σ = 584440272000. Its totient is φ = 47132265600.

The previous prime is 205221771121. The next prime is 205221771239. The reversal of 205221771150 is 51177122502.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3241725 + ... + 3304424.

It is an arithmetic number, because the mean of its divisors is an integer number (6087919500).

Almost surely, 2^205221771150 is an apocalyptic number.

205221771150 is an abundant number, since it is smaller than the sum of its proper divisors (379218500850).

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

205221771150 is a wasteful number, since it uses less digits than its factorization.

205221771150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6546194 (or 6546189 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 33.

Adding to 205221771150 its reverse (51177122502), we get a palindrome (256398893652).

The spelling of 205221771150 in words is "two hundred five billion, two hundred twenty-one million, seven hundred seventy-one thousand, one hundred fifty".