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2131444 = 22776123
BaseRepresentation
bin1000001000010111110100
311000021210101
420020113310
51021201234
6113403444
724055060
oct10102764
94007711
102131444
111226427
12869584
13598213
143d6aa0
152c1814
hex2085f4

2131444 has 12 divisors (see below), whose sum is σ = 4262944. Its totient is φ = 913464.

The previous prime is 2131429. The next prime is 2131447. The reversal of 2131444 is 4441312.

2131444 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131447) 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, 38034 + ... + 38089.

22131444 is an apocalyptic number.

It is an amenable number.

2131444 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.

2131444 is a wasteful number, since it uses less digits than its factorization.

2131444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76134 (or 76132 counting only the distinct ones).

The product of its digits is 384, while the sum is 19.

The square root of 2131444 is about 1459.9465743650. The cubic root of 2131444 is about 128.6939039882.

Adding to 2131444 its reverse (4441312), we get a palindrome (6572756).

The spelling of 2131444 in words is "two million, one hundred thirty-one thousand, four hundred forty-four".

Divisors: 1 2 4 7 14 28 76123 152246 304492 532861 1065722 2131444