205151455 has 16 divisors (see below), whose sum is σ = 259670880. Its totient is φ = 155164032.

The previous prime is 205151431. The next prime is 205151489. The reversal of 205151455 is 554151502.

It is not a de Polignac number, because 205151455 - 2¹⁷ = 205020383 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50977 + ... + 54853.

It is an arithmetic number, because the mean of its divisors is an integer number (16229430).

Almost surely, 2^205151455 is an apocalyptic number.

205151455 is a deficient number, since it is larger than the sum of its proper divisors (54519425).

205151455 is a wasteful number, since it uses less digits than its factorization.

205151455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4458.

The product of its (nonzero) digits is 5000, while the sum is 28.

The square root of 205151455 is about 14323.1091247676. The cubic root of 205151455 is about 589.7820271127.

The spelling of 205151455 in words is "two hundred five million, one hundred fifty-one thousand, four hundred fifty-five".