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42215770 = 254221577
BaseRepresentation
bin1010000100001…
…0100101011010
32221102210011001
42201002211122
541301401040
64104455214
71021554022
oct241024532
987383131
1042215770
1121914373
121217a50a
13899125c
14586ca82
153a8d59a
hex284295a

42215770 has 8 divisors (see below), whose sum is σ = 75988404. Its totient is φ = 16886304.

The previous prime is 42215759. The next prime is 42215791. The reversal of 42215770 is 7751224.

It can be written as a sum of positive squares in 2 ways, for example, as 42211009 + 4761 = 6497^2 + 69^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2110779 + ... + 2110798.

Almost surely, 242215770 is an apocalyptic number.

42215770 is a deficient number, since it is larger than the sum of its proper divisors (33772634).

42215770 is a wasteful number, since it uses less digits than its factorization.

42215770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4221584.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 42215770 is about 6497.3663895458. The cubic root of 42215770 is about 348.1969038053.

Adding to 42215770 its reverse (7751224), we get a palindrome (49966994).

The spelling of 42215770 in words is "forty-two million, two hundred fifteen thousand, seven hundred seventy".

Divisors: 1 2 5 10 4221577 8443154 21107885 42215770