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42021222 = 237003537
BaseRepresentation
bin1010000001001…
…1000101100110
32221001220021120
42200103011212
541224134342
64100354410
71020113565
oct240230546
987056246
1042021222
11217a1191
12120a5a06
138923839
14581bbdc
153a50aec
hex2813166

42021222 has 8 divisors (see below), whose sum is σ = 84042456. Its totient is φ = 14007072.

The previous prime is 42021211. The next prime is 42021223. The reversal of 42021222 is 22212024.

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

42021222 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42021223) 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, 3501763 + ... + 3501774.

It is an arithmetic number, because the mean of its divisors is an integer number (10505307).

Almost surely, 242021222 is an apocalyptic number.

42021222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42021222 is a wasteful number, since it uses less digits than its factorization.

42021222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7003542.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 42021222 is about 6482.3778044788. The cubic root of 42021222 is about 347.6612008508.

Adding to 42021222 its reverse (22212024), we get a palindrome (64233246).

The spelling of 42021222 in words is "forty-two million, twenty-one thousand, two hundred twenty-two".

Divisors: 1 2 3 6 7003537 14007074 21010611 42021222