205215054 has 16 divisors (see below), whose sum is σ = 447742080. Its totient is φ = 62186360.

The previous prime is 205215053. The next prime is 205215083. The reversal of 205215054 is 450512502.

It is a happy number.

It is a super-2 number, since 2×205215054² = 84226436776445832, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205215053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1554594 + ... + 1554725.

It is an arithmetic number, because the mean of its divisors is an integer number (27983880).

Almost surely, 2^205215054 is an apocalyptic number.

205215054 is an abundant number, since it is smaller than the sum of its proper divisors (242527026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205215054 is a wasteful number, since it uses less digits than its factorization.

205215054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3109335.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 205215054 is about 14325.3291061672. The cubic root of 205215054 is about 589.8429669221.

Adding to 205215054 its reverse (450512502), we get a palindrome (655727556).

The spelling of 205215054 in words is "two hundred five million, two hundred fifteen thousand, fifty-four".