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230132661 = 31129240473
BaseRepresentation
bin11011011011110…
…00101110110101
3121001000221122220
431231320232311
5432403221121
634500312553
75463044463
oct1555705665
9531027586
10230132661
111089a4090
12650a2759
13388a7795
14227c7833
151530c6c6
hexdb78bb5

230132661 has 16 divisors (see below), whose sum is σ = 346282560. Its totient is φ = 134664320.

The previous prime is 230132657. The next prime is 230132663. The reversal of 230132661 is 166231032.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 230132661 - 22 = 230132657 is a prime.

It is a super-2 number, since 2×2301326612 = 105922083317881842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230132663) 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, 119280 + ... + 121193.

It is an arithmetic number, because the mean of its divisors is an integer number (21642660).

Almost surely, 2230132661 is an apocalyptic number.

It is an amenable number.

230132661 is a deficient number, since it is larger than the sum of its proper divisors (116149899).

230132661 is a wasteful number, since it uses less digits than its factorization.

230132661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240516.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 230132661 is about 15170.1239612602. The cubic root of 230132661 is about 612.8103425758.

Adding to 230132661 its reverse (166231032), we get a palindrome (396363693).

The spelling of 230132661 in words is "two hundred thirty million, one hundred thirty-two thousand, six hundred sixty-one".

Divisors: 1 3 11 29 33 87 319 957 240473 721419 2645203 6973717 7935609 20921151 76710887 230132661