Search a number
-
+
87223801 = 731401953
BaseRepresentation
bin1010011001011…
…10110111111001
320002010102120011
411030232313321
5134312130201
612353301521
72106250540
oct514566771
9202112504
1087223801
1145265595
12252648a1
13150bc422
14b827157
1579ce151
hex532edf9

87223801 has 8 divisors (see below), whose sum is σ = 102900224. Its totient is φ = 72351360.

The previous prime is 87223781. The next prime is 87223817. The reversal of 87223801 is 10832278.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87223801 - 27 = 87223673 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (87223891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200760 + ... + 201193.

It is an arithmetic number, because the mean of its divisors is an integer number (12862528).

Almost surely, 287223801 is an apocalyptic number.

It is an amenable number.

87223801 is a deficient number, since it is larger than the sum of its proper divisors (15676423).

87223801 is a wasteful number, since it uses less digits than its factorization.

87223801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401991.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 87223801 is about 9339.3683405250. The cubic root of 87223801 is about 443.4843881338.

The spelling of 87223801 in words is "eighty-seven million, two hundred twenty-three thousand, eight hundred one".

Divisors: 1 7 31 217 401953 2813671 12460543 87223801