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30263423 = 231315801
BaseRepresentation
bin111001101110…
…0100001111111
32002221112121112
41303130201333
530221412143
63000352235
7515143361
oct163344177
962845545
1030263423
11160a03a3
12a17567b
136367b68
14403ad31
1529cbe18
hex1cdc87f

30263423 has 4 divisors (see below), whose sum is σ = 31579248. Its totient is φ = 28947600.

The previous prime is 30263411. The next prime is 30263449. The reversal of 30263423 is 32436203.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32436203 = 50116473.

It is a cyclic number.

It is not a de Polignac number, because 30263423 - 24 = 30263407 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 1315801 = 30263423 / (3 + 0 + 2 + 6 + 3 + 4 + 2 + 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 (30263473) 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, 657878 + ... + 657923.

It is an arithmetic number, because the mean of its divisors is an integer number (7894812).

Almost surely, 230263423 is an apocalyptic number.

30263423 is a deficient number, since it is larger than the sum of its proper divisors (1315825).

30263423 is a wasteful number, since it uses less digits than its factorization.

30263423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315824.

The product of its (nonzero) digits is 2592, while the sum is 23.

The square root of 30263423 is about 5501.2201373877. The cubic root of 30263423 is about 311.6300643656.

Adding to 30263423 its reverse (32436203), we get a palindrome (62699626).

The spelling of 30263423 in words is "thirty million, two hundred sixty-three thousand, four hundred twenty-three".

Divisors: 1 23 1315801 30263423