205155701 has 4 divisors (see below), whose sum is σ = 207073152. Its totient is φ = 203238252.

The previous prime is 205155661. The next prime is 205155751. The reversal of 205155701 is 107551502.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 107551502 = 2 ⋅53775751.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205155701 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 (205155751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 958565 + ... + 958778.

It is an arithmetic number, because the mean of its divisors is an integer number (51768288).

Almost surely, 2^205155701 is an apocalyptic number.

It is an amenable number.

205155701 is a deficient number, since it is larger than the sum of its proper divisors (1917451).

205155701 is a wasteful number, since it uses less digits than its factorization.

205155701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1917450.

The product of its (nonzero) digits is 1750, while the sum is 26.

The square root of 205155701 is about 14323.2573460090. The cubic root of 205155701 is about 589.7860959720.

The spelling of 205155701 in words is "two hundred five million, one hundred fifty-five thousand, seven hundred one".