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5161985 = 51032397
BaseRepresentation
bin10011101100010000000001
3100201020220122
4103230100001
52310140420
6302350025
761606343
oct23542001
910636818
105161985
112a06304
12188b315
1310b973a
14985293
156be725
hex4ec401

5161985 has 4 divisors (see below), whose sum is σ = 6194388. Its totient is φ = 4129584.

The previous prime is 5161967. The next prime is 5161993. The reversal of 5161985 is 5891615.

It is a Cunningham number, because it is equal to 22722+1.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1860496 + 3301489 = 1364^2 + 1817^2 .

It is a cyclic number.

It is not a de Polignac number, because 5161985 - 26 = 5161921 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 516194 + ... + 516203.

It is an arithmetic number, because the mean of its divisors is an integer number (1548597).

Almost surely, 25161985 is an apocalyptic number.

It is an amenable number.

5161985 is a deficient number, since it is larger than the sum of its proper divisors (1032403).

5161985 is a wasteful number, since it uses less digits than its factorization.

5161985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032402.

The product of its digits is 10800, while the sum is 35.

The square root of 5161985 is about 2272.0002200704. Note that the first 3 decimals coincide. The cubic root of 5161985 is about 172.8246075674.

The spelling of 5161985 in words is "five million, one hundred sixty-one thousand, nine hundred eighty-five".

Divisors: 1 5 1032397 5161985