204111451 has 2 divisors, whose sum is σ = 204111452. Its totient is φ = 204111450.

The previous prime is 204111421. The next prime is 204111473. The reversal of 204111451 is 154111402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204111451 - 2⁵ = 204111419 is a prime.

It is a super-2 number, since 2×204111451² = 83322968858650802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (204111421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102055725 + 102055726.

It is an arithmetic number, because the mean of its divisors is an integer number (102055726).

Almost surely, 2^204111451 is an apocalyptic number.

204111451 is a deficient number, since it is larger than the sum of its proper divisors (1).

204111451 is an equidigital number, since it uses as much as digits as its factorization.

204111451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 204111451 is about 14286.7578897383. The cubic root of 204111451 is about 588.7837157469.

Adding to 204111451 its reverse (154111402), we get a palindrome (358222853).

The spelling of 204111451 in words is "two hundred four million, one hundred eleven thousand, four hundred fifty-one".