551651605 has 16 divisors (see below), whose sum is σ = 697561920. Its totient is φ = 417650688.

The previous prime is 551651599. The next prime is 551651627. The reversal of 551651605 is 506156155.

It is a cyclic number.

It is not a de Polignac number, because 551651605 - 2¹³ = 551643413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107989 + ... + 112981.

It is an arithmetic number, because the mean of its divisors is an integer number (43597620).

Almost surely, 2^551651605 is an apocalyptic number.

It is an amenable number.

551651605 is a deficient number, since it is larger than the sum of its proper divisors (145910315).

551651605 is a wasteful number, since it uses less digits than its factorization.

551651605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6180.

The product of its (nonzero) digits is 22500, while the sum is 34.

The square root of 551651605 is about 23487.2647407058. The cubic root of 551651605 is about 820.1405692982.

It can be divided in two parts, 5516 and 51605, that added together give a square (57121 = 239²).

The spelling of 551651605 in words is "five hundred fifty-one million, six hundred fifty-one thousand, six hundred five".