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85506551 = 136577427
BaseRepresentation
bin1010001100010…
…11100111110111
312221220011221022
411012023213313
5133342202201
612252411355
72055536144
oct506134767
9187804838
1085506551
11442a2379
1224776b5b
131493a8c0
14b4db3cb
15779041b
hex518b9f7

85506551 has 4 divisors (see below), whose sum is σ = 92083992. Its totient is φ = 78929112.

The previous prime is 85506523. The next prime is 85506557. The reversal of 85506551 is 15560558.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85506551 - 218 = 85244407 is a prime.

It is a super-2 number, since 2×855065512 = 14622740527831202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85506557) 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, 3288701 + ... + 3288726.

It is an arithmetic number, because the mean of its divisors is an integer number (23020998).

Almost surely, 285506551 is an apocalyptic number.

85506551 is a deficient number, since it is larger than the sum of its proper divisors (6577441).

85506551 is a wasteful number, since it uses less digits than its factorization.

85506551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6577440.

The product of its (nonzero) digits is 30000, while the sum is 35.

The square root of 85506551 is about 9246.9752351783. The cubic root of 85506551 is about 440.5546569196.

The spelling of 85506551 in words is "eighty-five million, five hundred six thousand, five hundred fifty-one".

Divisors: 1 13 6577427 85506551