Search a number
-
+
20525201 = 34635927
BaseRepresentation
bin100111001001…
…1000010010001
31102121210021122
41032103002101
520223301301
62011532025
7336314144
oct116230221
942553248
1020525201
1110649984
126a5a015
1343384b8
142a2405b
151c0681b
hex1393091

20525201 has 4 divisors (see below), whose sum is σ = 20534592. Its totient is φ = 20515812.

The previous prime is 20525189. The next prime is 20525213. The reversal of 20525201 is 10252502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (20525189) and next prime (20525213).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-20525201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20525201.

It is not an unprimeable number, because it can be changed into a prime (20525231) 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, 500 + ... + 6426.

It is an arithmetic number, because the mean of its divisors is an integer number (5133648).

Almost surely, 220525201 is an apocalyptic number.

It is an amenable number.

20525201 is a deficient number, since it is larger than the sum of its proper divisors (9391).

20525201 is an equidigital number, since it uses as much as digits as its factorization.

20525201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9390.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 20525201 is about 4530.4746991899. The cubic root of 20525201 is about 273.7972864389.

Adding to 20525201 its reverse (10252502), we get a palindrome (30777703).

The spelling of 20525201 in words is "twenty million, five hundred twenty-five thousand, two hundred one".

Divisors: 1 3463 5927 20525201