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19525 = 521171
BaseRepresentation
bin100110001000101
3222210011
410301011
51111100
6230221
7110632
oct46105
928704
1019525
1113740
12b371
138b6c
147189
155bba
hex4c45

19525 has 12 divisors (see below), whose sum is σ = 26784. Its totient is φ = 14000.

The previous prime is 19507. The next prime is 19531. The reversal of 19525 is 52591.

19525 = T54 + T55 + ... + T64.

19525 = 152 + 162 + ... + 392.

It is not a de Polignac number, because 19525 - 29 = 19013 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 5.

It is a zygodrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 19496 and 19505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 240 + ... + 310.

It is an arithmetic number, because the mean of its divisors is an integer number (2232).

219525 is an apocalyptic number.

It is an amenable number.

19525 is a deficient number, since it is larger than the sum of its proper divisors (7259).

19525 is a wasteful number, since it uses less digits than its factorization.

19525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92 (or 87 counting only the distinct ones).

The product of its digits is 450, while the sum is 22.

The square root of 19525 is about 139.7318861248. The cubic root of 19525 is about 26.9275607393.

Subtracting from 19525 its sum of digits (22), we obtain a triangular number (19503 = T197).

The spelling of 19525 in words is "nineteen thousand, five hundred twenty-five".

Divisors: 1 5 11 25 55 71 275 355 781 1775 3905 19525