205540454 has 16 divisors (see below), whose sum is σ = 355846176. Its totient is φ = 87216000.

The previous prime is 205540403. The next prime is 205540457. The reversal of 205540454 is 454045502.

It is a super-2 number, since 2×205540454² = 84493756461052232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205540457) 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, 71267 + ... + 74094.

It is an arithmetic number, because the mean of its divisors is an integer number (22240386).

Almost surely, 2^205540454 is an apocalyptic number.

205540454 is a deficient number, since it is larger than the sum of its proper divisors (150305722).

205540454 is a wasteful number, since it uses less digits than its factorization.

205540454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145471.

The product of its (nonzero) digits is 16000, while the sum is 29.

The square root of 205540454 is about 14336.6821126787. The cubic root of 205540454 is about 590.1545645032.

Adding to 205540454 its reverse (454045502), we get a palindrome (659585956).

The spelling of 205540454 in words is "two hundred five million, five hundred forty thousand, four hundred fifty-four".