205152025451 has 4 divisors (see below), whose sum is σ = 217219791672. Its totient is φ = 193084259232.

The previous prime is 205152025427. The next prime is 205152025457. The reversal of 205152025451 is 154520251502.

It is a happy number.

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 205152025451 - 2¹⁴ = 205152009067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205152025457) 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, 6033883085 + ... + 6033883118.

It is an arithmetic number, because the mean of its divisors is an integer number (54304947918).

Almost surely, 2^205152025451 is an apocalyptic number.

205152025451 is a deficient number, since it is larger than the sum of its proper divisors (12067766221).

205152025451 is a wasteful number, since it uses less digits than its factorization.

205152025451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12067766220.

The product of its (nonzero) digits is 20000, while the sum is 32.

Adding to 205152025451 its reverse (154520251502), we get a palindrome (359672276953).

The spelling of 205152025451 in words is "two hundred five billion, one hundred fifty-two million, twenty-five thousand, four hundred fifty-one".