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230420253 = 3710972393
BaseRepresentation
bin11011011101111…
…10111100011101
3121001120120011110
431232332330131
5432441422003
634510412233
75465353110
oct1556767435
9531516143
10230420253
11109080168
1265201079
133897865b
1422860577
1515367a03
hexdbbef1d

230420253 has 8 divisors (see below), whose sum is σ = 351116608. Its totient is φ = 131668704.

The previous prime is 230420249. The next prime is 230420263. The reversal of 230420253 is 352024032.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 230420253 - 22 = 230420249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 10972393 = 230420253 / (2 + 3 + 0 + 4 + 2 + 0 + 2 + 5 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230420213) 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, 5486176 + ... + 5486217.

It is an arithmetic number, because the mean of its divisors is an integer number (43889576).

Almost surely, 2230420253 is an apocalyptic number.

It is an amenable number.

230420253 is a deficient number, since it is larger than the sum of its proper divisors (120696355).

230420253 is a wasteful number, since it uses less digits than its factorization.

230420253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10972403.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 230420253 is about 15179.5998959129. The cubic root of 230420253 is about 613.0655084266.

Adding to 230420253 its reverse (352024032), we get a palindrome (582444285).

The spelling of 230420253 in words is "two hundred thirty million, four hundred twenty thousand, two hundred fifty-three".

Divisors: 1 3 7 21 10972393 32917179 76806751 230420253