205550157 has 4 divisors (see below), whose sum is σ = 274066880. Its totient is φ = 137033436.

The previous prime is 205550153. The next prime is 205550167. The reversal of 205550157 is 751055502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 205550157 - 2² = 205550153 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205550153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34258357 + ... + 34258362.

It is an arithmetic number, because the mean of its divisors is an integer number (68516720).

Almost surely, 2^205550157 is an apocalyptic number.

It is an amenable number.

205550157 is a deficient number, since it is larger than the sum of its proper divisors (68516723).

205550157 is an equidigital number, since it uses as much as digits as its factorization.

205550157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68516722.

The product of its (nonzero) digits is 8750, while the sum is 30.

The square root of 205550157 is about 14337.0205063674. The cubic root of 205550157 is about 590.1638508821.

The spelling of 205550157 in words is "two hundred five million, five hundred fifty thousand, one hundred fifty-seven".