204545314531 has 4 divisors (see below), whose sum is σ = 204751718464. Its totient is φ = 204338910600.

The previous prime is 204545314459. The next prime is 204545314537. The reversal of 204545314531 is 135413545402.

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 204545314531 - 2¹⁵ = 204545281763 is a prime.

It is a super-2 number, since 2×204545314531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204545314537) 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, 103200480 + ... + 103202461.

It is an arithmetic number, because the mean of its divisors is an integer number (51187929616).

Almost surely, 2^204545314531 is an apocalyptic number.

204545314531 is a deficient number, since it is larger than the sum of its proper divisors (206403933).

204545314531 is an equidigital number, since it uses as much as digits as its factorization.

204545314531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206403932.

The product of its (nonzero) digits is 144000, while the sum is 37.

Adding to 204545314531 its reverse (135413545402), we get a palindrome (339958859933).

The spelling of 204545314531 in words is "two hundred four billion, five hundred forty-five million, three hundred fourteen thousand, five hundred thirty-one".