205550919 has 32 divisors (see below), whose sum is σ = 349655040. Its totient is φ = 116906976.

The previous prime is 205550909. The next prime is 205550951. The reversal of 205550919 is 919055502.

It is not a de Polignac number, because 205550919 - 2⁴ = 205550903 is a prime.

It is a super-2 number, since 2×205550919² = 84502360603489122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205550909) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39709 + ... + 44585.

It is an arithmetic number, because the mean of its divisors is an integer number (10926720).

Almost surely, 2^205550919 is an apocalyptic number.

205550919 is a deficient number, since it is larger than the sum of its proper divisors (144104121).

205550919 is a wasteful number, since it uses less digits than its factorization.

205550919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5116 (or 5110 counting only the distinct ones).

The product of its (nonzero) digits is 20250, while the sum is 36.

The square root of 205550919 is about 14337.0470809020. The cubic root of 205550919 is about 590.1645801515.

The spelling of 205550919 in words is "two hundred five million, five hundred fifty thousand, nine hundred nineteen".