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551402887 = 7271290671
BaseRepresentation
bin100000110111011…
…011110110000111
31102102120011120011
4200313123312013
52112124343022
6130414251051
716443563410
oct4067336607
91372504504
10551402887
11263286172
121347b6a87
138a311bc9
1453336807
153361d977
hex20ddbd87

551402887 has 8 divisors (see below), whose sum is σ = 632502272. Its totient is φ = 470885400.

The previous prime is 551402881. The next prime is 551402903. The reversal of 551402887 is 788204155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 551402887 - 219 = 550878599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551402881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143439 + ... + 147232.

It is an arithmetic number, because the mean of its divisors is an integer number (79062784).

Almost surely, 2551402887 is an apocalyptic number.

551402887 is a deficient number, since it is larger than the sum of its proper divisors (81099385).

551402887 is a wasteful number, since it uses less digits than its factorization.

551402887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290949.

The product of its (nonzero) digits is 89600, while the sum is 40.

The square root of 551402887 is about 23481.9694020753. The cubic root of 551402887 is about 820.0172944003.

The spelling of 551402887 in words is "five hundred fifty-one million, four hundred two thousand, eight hundred eighty-seven".

Divisors: 1 7 271 1897 290671 2034697 78771841 551402887