205231451 has 4 divisors (see below), whose sum is σ = 206090400. Its totient is φ = 204372504.

The previous prime is 205231447. The next prime is 205231513. The reversal of 205231451 is 154132502.

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 205231451 - 2² = 205231447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205231051) 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, 429116 + ... + 429593.

It is an arithmetic number, because the mean of its divisors is an integer number (51522600).

Almost surely, 2^205231451 is an apocalyptic number.

205231451 is a deficient number, since it is larger than the sum of its proper divisors (858949).

205231451 is an equidigital number, since it uses as much as digits as its factorization.

205231451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858948.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 205231451 is about 14325.9014027041. The cubic root of 205231451 is about 589.8586762920.

Adding to 205231451 its reverse (154132502), we get a palindrome (359363953).

The spelling of 205231451 in words is "two hundred five million, two hundred thirty-one thousand, four hundred fifty-one".