204051242453 has 2 divisors, whose sum is σ = 204051242454. Its totient is φ = 204051242452.

The previous prime is 204051242449. The next prime is 204051242491. The reversal of 204051242453 is 354242150402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136454882404 + 67596360049 = 369398^2 + 259993^2 .

It is a cyclic number.

It is not a de Polignac number, because 204051242453 - 2² = 204051242449 is a prime.

It is a super-2 number, since 2×204051242453² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204051242413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102025621226 + 102025621227.

It is an arithmetic number, because the mean of its divisors is an integer number (102025621227).

Almost surely, 2^204051242453 is an apocalyptic number.

It is an amenable number.

204051242453 is a deficient number, since it is larger than the sum of its proper divisors (1).

204051242453 is an equidigital number, since it uses as much as digits as its factorization.

204051242453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 204051242453 its reverse (354242150402), we get a palindrome (558293392855).

The spelling of 204051242453 in words is "two hundred four billion, fifty-one million, two hundred forty-two thousand, four hundred fifty-three".