205125506 has 4 divisors (see below), whose sum is σ = 307688262. Its totient is φ = 102562752.

The previous prime is 205125499. The next prime is 205125517. The reversal of 205125506 is 605521502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 187443481 + 17682025 = 13691^2 + 4205^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51281375 + ... + 51281378.

Almost surely, 2^205125506 is an apocalyptic number.

205125506 is a deficient number, since it is larger than the sum of its proper divisors (102562756).

205125506 is a wasteful number, since it uses less digits than its factorization.

205125506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102562755.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 205125506 is about 14322.2032522933. The cubic root of 205125506 is about 589.7571594702.

The spelling of 205125506 in words is "two hundred five million, one hundred twenty-five thousand, five hundred six".