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87551 = 293019
BaseRepresentation
bin10101010111111111
311110002122
4111113333
510300201
61513155
7513152
oct252777
9143078
1087551
115a862
12427bb
1330b09
1423c99
151ae1b
hex155ff

87551 has 4 divisors (see below), whose sum is σ = 90600. Its totient is φ = 84504.

The previous prime is 87547. The next prime is 87553. The reversal of 87551 is 15578.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15578 = 27789.

It is a cyclic number.

It is not a de Polignac number, because 87551 - 22 = 87547 is a prime.

It is a Duffinian number.

It is a plaindrome in base 4 and base 16.

It is a nialpdrome in base 10.

It is a zygodrome in base 4.

It is a self number, because there is not a number n which added to its sum of digits gives 87551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1481 + ... + 1538.

It is an arithmetic number, because the mean of its divisors is an integer number (22650).

287551 is an apocalyptic number.

87551 is a deficient number, since it is larger than the sum of its proper divisors (3049).

87551 is a wasteful number, since it uses less digits than its factorization.

87551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3048.

The product of its digits is 1400, while the sum is 26.

The square root of 87551 is about 295.8901823312. The cubic root of 87551 is about 44.4038237650.

The spelling of 87551 in words is "eighty-seven thousand, five hundred fifty-one".

Divisors: 1 29 3019 87551