205421302245050 has 24 divisors (see below), whose sum is σ = 382734531297216. Its totient is φ = 82028540441840.

The previous prime is 205421302245037. The next prime is 205421302245101. The reversal of 205421302245050 is 50542203124502.

It is a happy number.

It is a super-2 number, since 2×205421302245050² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 205421302245050.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3499481762 + ... + 3499540461.

It is an arithmetic number, because the mean of its divisors is an integer number (15947272137384).

Almost surely, 2^{205421302245050} is an apocalyptic number.

205421302245050 is a deficient number, since it is larger than the sum of its proper divisors (177313229052166).

205421302245050 is a wasteful number, since it uses less digits than its factorization.

205421302245050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6999022822 (or 6999022817 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 205421302245050 its reverse (50542203124502), we get a palindrome (255963505369552).

The spelling of 205421302245050 in words is "two hundred five trillion, four hundred twenty-one billion, three hundred two million, two hundred forty-five thousand, fifty".