204520145051 has 4 divisors (see below), whose sum is σ = 204589312752. Its totient is φ = 204450977352.

The previous prime is 204520145029. The next prime is 204520145087. The reversal of 204520145051 is 150541025402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 204520145051 - 2²² = 204515950747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204520145251) 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, 34579415 + ... + 34585328.

It is an arithmetic number, because the mean of its divisors is an integer number (51147328188).

Almost surely, 2^204520145051 is an apocalyptic number.

204520145051 is a deficient number, since it is larger than the sum of its proper divisors (69167701).

204520145051 is an equidigital number, since it uses as much as digits as its factorization.

204520145051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69167700.

The product of its (nonzero) digits is 8000, while the sum is 29.

The spelling of 204520145051 in words is "two hundred four billion, five hundred twenty million, one hundred forty-five thousand, fifty-one".