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21229295 = 537311383
BaseRepresentation
bin101000011111…
…0111011101111
31110221120010012
41100332323233
520413314140
62035003435
7345305663
oct120767357
943846105
1021229295
1110a8a97a
12713957b
134523b19
142b688a3
151ce5265
hex143eeef

21229295 has 8 divisors (see below), whose sum is σ = 25545696. Its totient is φ = 16936416.

The previous prime is 21229261. The next prime is 21229297. The reversal of 21229295 is 59292212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-21229295 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 (21229297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3827 + ... + 7556.

It is an arithmetic number, because the mean of its divisors is an integer number (3193212).

Almost surely, 221229295 is an apocalyptic number.

21229295 is a deficient number, since it is larger than the sum of its proper divisors (4316401).

21229295 is a wasteful number, since it uses less digits than its factorization.

21229295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11761.

The product of its digits is 6480, while the sum is 32.

The square root of 21229295 is about 4607.5259087714. The cubic root of 21229295 is about 276.8929238991.

The spelling of 21229295 in words is "twenty-one million, two hundred twenty-nine thousand, two hundred ninety-five".

Divisors: 1 5 373 1865 11383 56915 4245859 21229295