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242521665 = 35612391109
BaseRepresentation
bin11100111010010…
…01011001000001
3121220100101011220
432131021121001
5444041143130
640022025253
76003254151
oct1635113101
9556311156
10242521665
11114996131
1269278229
133b324859
14242d0761
1516458410
hexe749641

242521665 has 32 divisors (see below), whose sum is σ = 396403200. Its totient is φ = 126577920.

The previous prime is 242521651. The next prime is 242521691. The reversal of 242521665 is 566125242.

It is not a de Polignac number, because 242521665 - 25 = 242521633 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 218131 + ... + 219239.

It is an arithmetic number, because the mean of its divisors is an integer number (12387600).

Almost surely, 2242521665 is an apocalyptic number.

It is an amenable number.

242521665 is a deficient number, since it is larger than the sum of its proper divisors (153881535).

242521665 is a wasteful number, since it uses less digits than its factorization.

242521665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1417.

The product of its digits is 28800, while the sum is 33.

The square root of 242521665 is about 15573.1071080886. The cubic root of 242521665 is about 623.6154224437.

It can be divided in two parts, 2425 and 21665, that added together give a triangular number (24090 = T219).

The spelling of 242521665 in words is "two hundred forty-two million, five hundred twenty-one thousand, six hundred sixty-five".

Divisors: 1 3 5 15 61 183 239 305 717 915 1109 1195 3327 3585 5545 14579 16635 43737 67649 72895 202947 218685 265051 338245 795153 1014735 1325255 3975765 16168111 48504333 80840555 242521665