205501151 has 8 divisors (see below), whose sum is σ = 217715040. Its totient is φ = 193301248.

The previous prime is 205501133. The next prime is 205501181. The reversal of 205501151 is 151105502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205501151 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 (205501181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52670 + ... + 56436.

It is an arithmetic number, because the mean of its divisors is an integer number (27214380).

Almost surely, 2^205501151 is an apocalyptic number.

205501151 is a deficient number, since it is larger than the sum of its proper divisors (12213889).

205501151 is a wasteful number, since it uses less digits than its factorization.

205501151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6993.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 205501151 is about 14335.3113325104. The cubic root of 205501151 is about 590.1169460799.

Adding to 205501151 its reverse (151105502), we get a palindrome (356606653).

The spelling of 205501151 in words is "two hundred five million, five hundred one thousand, one hundred fifty-one".