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231664068 = 223213149123
BaseRepresentation
bin11011100111011…
…10100111000100
3121010220202100200
431303232213010
5433301222233
634553210500
75512053306
oct1563564704
9533822320
10231664068
1110984a709
1265700a30
1338cc283c
1422aa5976
1515511313
hexdcee9c4

231664068 has 36 divisors (see below), whose sum is σ = 590077488. Its totient is φ = 76630320.

The previous prime is 231664057. The next prime is 231664087. The reversal of 231664068 is 860466132.

231664068 is a `hidden beast` number, since 2 + 3 + 1 + 6 + 640 + 6 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19846 + ... + 29277.

Almost surely, 2231664068 is an apocalyptic number.

It is an amenable number.

231664068 is an abundant number, since it is smaller than the sum of its proper divisors (358413420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231664068 is a wasteful number, since it uses less digits than its factorization.

231664068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49264 (or 49259 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 231664068 is about 15220.5147087738. The cubic root of 231664068 is about 614.1666444227.

The spelling of 231664068 in words is "two hundred thirty-one million, six hundred sixty-four thousand, sixty-eight".

Divisors: 1 2 3 4 6 9 12 18 36 131 262 393 524 786 1179 1572 2358 4716 49123 98246 147369 196492 294738 442107 589476 884214 1768428 6435113 12870226 19305339 25740452 38610678 57916017 77221356 115832034 231664068