205551541 has 4 divisors (see below), whose sum is σ = 221363212. Its totient is φ = 189739872.

The previous prime is 205551523. The next prime is 205551559. The reversal of 205551541 is 145155502.

205551541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (205551523) and next prime (205551559).

It can be written as a sum of positive squares in 2 ways, for example, as 115111441 + 90440100 = 10729^2 + 9510^2 .

It is a cyclic number.

It is not a de Polignac number, because 205551541 - 2⁷ = 205551413 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 (205551571) 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, 7905816 + ... + 7905841.

It is an arithmetic number, because the mean of its divisors is an integer number (55340803).

Almost surely, 2^205551541 is an apocalyptic number.

It is an amenable number.

205551541 is a deficient number, since it is larger than the sum of its proper divisors (15811671).

205551541 is a wasteful number, since it uses less digits than its factorization.

205551541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15811670.

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

The square root of 205551541 is about 14337.0687729396. The cubic root of 205551541 is about 590.1651754330.

The spelling of 205551541 in words is "two hundred five million, five hundred fifty-one thousand, five hundred forty-one".