Search a number
-
+
56561655 = 3519719141
BaseRepresentation
bin1101011111000…
…0111111110111
310221102122000010
43113300333313
5103434433110
65340151303
71254523533
oct327607767
9127378003
1056561655
1129a22677
1216b38533
13b944c47
147724bc3
154e74020
hex35f0ff7

56561655 has 16 divisors (see below), whose sum is σ = 90962784. Its totient is φ = 30011520.

The previous prime is 56561627. The next prime is 56561663. The reversal of 56561655 is 55616565.

It is not a de Polignac number, because 56561655 - 28 = 56561399 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 (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6616 + ... + 12525.

It is an arithmetic number, because the mean of its divisors is an integer number (5685174).

Almost surely, 256561655 is an apocalyptic number.

56561655 is a deficient number, since it is larger than the sum of its proper divisors (34401129).

56561655 is a wasteful number, since it uses less digits than its factorization.

56561655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19346.

The product of its digits is 135000, while the sum is 39.

The square root of 56561655 is about 7520.7483005350. The cubic root of 56561655 is about 383.8610404863.

The spelling of 56561655 in words is "fifty-six million, five hundred sixty-one thousand, six hundred fifty-five".

Divisors: 1 3 5 15 197 591 985 2955 19141 57423 95705 287115 3770777 11312331 18853885 56561655