204027551 has 16 divisors (see below), whose sum is σ = 251893824. Its totient is φ = 160925184.

The previous prime is 204027541. The next prime is 204027553. The reversal of 204027551 is 155720402.

It is not a de Polignac number, because 204027551 - 2²⁶ = 136918687 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204027551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204027553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27341 + ... + 33993.

It is an arithmetic number, because the mean of its divisors is an integer number (15743364).

Almost surely, 2^204027551 is an apocalyptic number.

204027551 is a deficient number, since it is larger than the sum of its proper divisors (47866273).

204027551 is a wasteful number, since it uses less digits than its factorization.

204027551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7010.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 204027551 is about 14283.8213024386. The cubic root of 204027551 is about 588.7030315201.

Adding to 204027551 its reverse (155720402), we get a palindrome (359747953).

The spelling of 204027551 in words is "two hundred four million, twenty-seven thousand, five hundred fifty-one".