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230068621 = 1371679333
BaseRepresentation
bin11011011011010…
…01000110001101
3121000220200211001
431231221012031
5432344143441
634455100301
75462356666
oct1555510615
9530820731
10230068621
1110895aa62
1265071691
13388845a3
14227ac36d
15152e8731
hexdb6918d

230068621 has 4 divisors (see below), whose sum is σ = 231748092. Its totient is φ = 228389152.

The previous prime is 230068591. The next prime is 230068661. The reversal of 230068621 is 126860032.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 146071396 + 83997225 = 12086^2 + 9165^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-230068621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 230068621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230068661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 839530 + ... + 839803.

It is an arithmetic number, because the mean of its divisors is an integer number (57937023).

Almost surely, 2230068621 is an apocalyptic number.

It is an amenable number.

230068621 is a deficient number, since it is larger than the sum of its proper divisors (1679471).

230068621 is a wasteful number, since it uses less digits than its factorization.

230068621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1679470.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 230068621 is about 15168.0130867560. The cubic root of 230068621 is about 612.7534941839.

The spelling of 230068621 in words is "two hundred thirty million, sixty-eight thousand, six hundred twenty-one".

Divisors: 1 137 1679333 230068621