205454550 has 72 divisors (see below), whose sum is σ = 592736616. Its totient is φ = 46959360.

The previous prime is 205454533. The next prime is 205454551. The reversal of 205454550 is 55454502.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205454551) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6627 + ... + 21326.

It is an arithmetic number, because the mean of its divisors is an integer number (8232453).

Almost surely, 2^205454550 is an apocalyptic number.

205454550 is an abundant number, since it is smaller than the sum of its proper divisors (387282066).

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

205454550 is a wasteful number, since it uses less digits than its factorization.

205454550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27982 (or 27970 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 30.

The square root of 205454550 is about 14333.6858483783. The cubic root of 205454550 is about 590.0723362425.

The spelling of 205454550 in words is "two hundred five million, four hundred fifty-four thousand, five hundred fifty".