204243154541 has 2 divisors, whose sum is σ = 204243154542. Its totient is φ = 204243154540.

The previous prime is 204243154523. The next prime is 204243154559. The reversal of 204243154541 is 145451342402.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (204243154523) and next prime (204243154559).

It can be written as a sum of positive squares in only one way, i.e., 203607610441 + 635544100 = 451229^2 + 25210^2 .

It is a cyclic number.

It is not a de Polignac number, because 204243154541 - 2¹⁸ = 204242892397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204243124541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102121577270 + 102121577271.

It is an arithmetic number, because the mean of its divisors is an integer number (102121577271).

Almost surely, 2^204243154541 is an apocalyptic number.

It is an amenable number.

204243154541 is a deficient number, since it is larger than the sum of its proper divisors (1).

204243154541 is an equidigital number, since it uses as much as digits as its factorization.

204243154541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 204243154541 its reverse (145451342402), we get a palindrome (349694496943).

The spelling of 204243154541 in words is "two hundred four billion, two hundred forty-three million, one hundred fifty-four thousand, five hundred forty-one".