205421331552 has 24 divisors (see below), whose sum is σ = 539230995576. Its totient is φ = 68473777152.

The previous prime is 205421331547. The next prime is 205421331553. The reversal of 205421331552 is 255133124502.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205421331553) 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, 1069902673 + ... + 1069902864.

It is an arithmetic number, because the mean of its divisors is an integer number (22467958149).

Almost surely, 2^205421331552 is an apocalyptic number.

It is an amenable number.

205421331552 is an abundant number, since it is smaller than the sum of its proper divisors (333809664024).

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

205421331552 is a wasteful number, since it uses less digits than its factorization.

205421331552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2139805550 (or 2139805542 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The spelling of 205421331552 in words is "two hundred five billion, four hundred twenty-one million, three hundred thirty-one thousand, five hundred fifty-two".