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130864221 = 334846823
BaseRepresentation
bin1111100110011…
…01010001011101
3100010020120222000
413303031101131
5232000123341
620552512513
73146220225
oct763152135
9303216860
10130864221
1167962254
12379ab739
132115bc67
1413547085
15b74e8b6
hex7ccd45d

130864221 has 8 divisors (see below), whose sum is σ = 193872960. Its totient is φ = 87242796.

The previous prime is 130864213. The next prime is 130864243. The reversal of 130864221 is 122468031.

130864221 is a `hidden beast` number, since 13 + 0 + 8 + 642 + 2 + 1 = 666.

It is not a de Polignac number, because 130864221 - 23 = 130864213 is a prime.

It is a super-3 number, since 3×1308642213 (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 4846823 = 130864221 / (1 + 3 + 0 + 8 + 6 + 4 + 2 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130864271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2423385 + ... + 2423438.

It is an arithmetic number, because the mean of its divisors is an integer number (24234120).

Almost surely, 2130864221 is an apocalyptic number.

It is an amenable number.

130864221 is a deficient number, since it is larger than the sum of its proper divisors (63008739).

130864221 is an equidigital number, since it uses as much as digits as its factorization.

130864221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4846832 (or 4846826 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 130864221 is about 11439.5900713269. The cubic root of 130864221 is about 507.6997794673.

The spelling of 130864221 in words is "one hundred thirty million, eight hundred sixty-four thousand, two hundred twenty-one".

Divisors: 1 3 9 27 4846823 14540469 43621407 130864221