205510151 has 12 divisors (see below), whose sum is σ = 258162576. Its totient is φ = 160137120.

The previous prime is 205510133. The next prime is 205510171. The reversal of 205510151 is 151015502.

It is a happy number.

It is not a de Polignac number, because 205510151 - 2⁶ = 205510087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205510121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120470 + ... + 122163.

It is an arithmetic number, because the mean of its divisors is an integer number (21513548).

Almost surely, 2^205510151 is an apocalyptic number.

205510151 is a deficient number, since it is larger than the sum of its proper divisors (52652425).

205510151 is a wasteful number, since it uses less digits than its factorization.

205510151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242662 (or 242651 counting only the distinct ones).

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

The square root of 205510151 is about 14335.6252392423. The cubic root of 205510151 is about 590.1255607518.

Adding to 205510151 its reverse (151015502), we get a palindrome (356525653).

The spelling of 205510151 in words is "two hundred five million, five hundred ten thousand, one hundred fifty-one".