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55957540 = 22517164581
BaseRepresentation
bin1101010101110…
…1100000100100
310220021221022111
43111131200210
5103311120130
65315210404
71246426342
oct325354044
9126257274
1055957540
112964a801
12168a6a04
13b792c92
147608992
154da502a
hex355d824

55957540 has 24 divisors (see below), whose sum is σ = 124423992. Its totient is φ = 21066240.

The previous prime is 55957519. The next prime is 55957541. The reversal of 55957540 is 4575955.

It can be written as a sum of positive squares in 4 ways, for example, as 9144576 + 46812964 = 3024^2 + 6842^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 55957493 and 55957502.

It is not an unprimeable number, because it can be changed into a prime (55957541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81951 + ... + 82630.

It is an arithmetic number, because the mean of its divisors is an integer number (5184333).

Almost surely, 255957540 is an apocalyptic number.

It is an amenable number.

55957540 is an abundant number, since it is smaller than the sum of its proper divisors (68466452).

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

55957540 is a wasteful number, since it uses less digits than its factorization.

55957540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164607 (or 164605 counting only the distinct ones).

The product of its (nonzero) digits is 157500, while the sum is 40.

The square root of 55957540 is about 7480.4772575017. The cubic root of 55957540 is about 382.4895179892.

The spelling of 55957540 in words is "fifty-five million, nine hundred fifty-seven thousand, five hundred forty".

Divisors: 1 2 4 5 10 17 20 34 68 85 170 340 164581 329162 658324 822905 1645810 2797877 3291620 5595754 11191508 13989385 27978770 55957540