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23028253 = 28977949
BaseRepresentation
bin101011111011…
…0001000011101
31121022221211021
41113312020131
521343401003
62141324141
7366510523
oct127661035
947287737
1023028253
1111aa9516
127866651
134a038b1
1430b6313
15204d2bd
hex15f621d

23028253 has 4 divisors (see below), whose sum is σ = 23039100. Its totient is φ = 23017408.

The previous prime is 23028241. The next prime is 23028259. The reversal of 23028253 is 35282032.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6365529 + 16662724 = 2523^2 + 4082^2 .

It is a cyclic number.

It is not a de Polignac number, because 23028253 - 221 = 20931101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23028259) 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, 1078 + ... + 6871.

It is an arithmetic number, because the mean of its divisors is an integer number (5759775).

Almost surely, 223028253 is an apocalyptic number.

It is an amenable number.

23028253 is a deficient number, since it is larger than the sum of its proper divisors (10847).

23028253 is an equidigital number, since it uses as much as digits as its factorization.

23028253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10846.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 23028253 is about 4798.7761981572. The cubic root of 23028253 is about 284.5030963862.

It can be divided in two parts, 2 and 3028253, that multiplied together give a palindrome (6056506).

The spelling of 23028253 in words is "twenty-three million, twenty-eight thousand, two hundred fifty-three".

Divisors: 1 2897 7949 23028253