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215044 = 22371453
BaseRepresentation
bin110100100000000100
3101220222121
4310200010
523340134
64335324
71553644
oct644004
9356877
10215044
11137625
12a4544
1376b5b
1458524
1543ab4
hex34804

215044 has 12 divisors (see below), whose sum is σ = 386764. Its totient is φ = 104544.

The previous prime is 214993. The next prime is 215051. The reversal of 215044 is 440512.

Adding to 215044 its reverse (440512), we get a palindrome (655556).

It can be written as a sum of positive squares in 2 ways, for example, as 202500 + 12544 = 450^2 + 112^2 .

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 579 + ... + 874.

215044 is a Friedman number, since it can be written as 4+210*4^5, using all its digits and the basic arithmetic operations.

2215044 is an apocalyptic number.

It is an amenable number.

215044 is a deficient number, since it is larger than the sum of its proper divisors (171720).

215044 is a wasteful number, since it uses less digits than its factorization.

215044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494 (or 1492 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 215044 is about 463.7283687678. The cubic root of 215044 is about 59.9113505673.

The spelling of 215044 in words is "two hundred fifteen thousand, forty-four".

Divisors: 1 2 4 37 74 148 1453 2906 5812 53761 107522 215044