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52090221 = 317363407
BaseRepresentation
bin1100011010110…
…1010101101101
310122000110100110
43012231111231
5101313341341
65100250233
71201521351
oct306552555
9118013313
1052090221
1127449177
1215540979
13aa3a921
146cbd461
15488e216
hex31ad56d

52090221 has 4 divisors (see below), whose sum is σ = 69453632. Its totient is φ = 34726812.

The previous prime is 52090217. The next prime is 52090223. The reversal of 52090221 is 12209025.

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.

It is not a de Polignac number, because 52090221 - 22 = 52090217 is a prime.

It is a super-2 number, since 2×520902212 = 5426782247657682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52090223) 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, 8681701 + ... + 8681706.

It is an arithmetic number, because the mean of its divisors is an integer number (17363408).

Almost surely, 252090221 is an apocalyptic number.

It is an amenable number.

52090221 is a deficient number, since it is larger than the sum of its proper divisors (17363411).

52090221 is a wasteful number, since it uses less digits than its factorization.

52090221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17363410.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 52090221 is about 7217.3555406395. The cubic root of 52090221 is about 373.4668569126.

Adding to 52090221 its reverse (12209025), we get a palindrome (64299246).

The spelling of 52090221 in words is "fifty-two million, ninety thousand, two hundred twenty-one".

Divisors: 1 3 17363407 52090221