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5648215 = 51129643
BaseRepresentation
bin10101100010111101010111
3101121221220011
4111202331113
52421220330
6321021051
766003046
oct25427527
911557804
105648215
113208651
121a84787
131229b51
14a7055d
1576882a
hex562f57

5648215 has 4 divisors (see below), whose sum is σ = 6777864. Its totient is φ = 4518568.

The previous prime is 5648197. The next prime is 5648219. The reversal of 5648215 is 5128465.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5128465 = 51025693.

It is a cyclic number.

It is not a de Polignac number, because 5648215 - 25 = 5648183 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

5648215 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5648219) 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, 564817 + ... + 564826.

It is an arithmetic number, because the mean of its divisors is an integer number (1694466).

Almost surely, 25648215 is an apocalyptic number.

5648215 is a deficient number, since it is larger than the sum of its proper divisors (1129649).

5648215 is a wasteful number, since it uses less digits than its factorization.

5648215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129648.

The product of its digits is 9600, while the sum is 31.

The square root of 5648215 is about 2376.5973575682. The cubic root of 5648215 is about 178.0889909769.

The spelling of 5648215 in words is "five million, six hundred forty-eight thousand, two hundred fifteen".

Divisors: 1 5 1129643 5648215