[go: up one dir, main page]

Search a number
-
+
30646271 = 131233941
BaseRepresentation
bin111010011100…
…1111111111111
32010122222210002
41310321333333
530321140041
63012504515
7521326505
oct164717777
963588702
1030646271
1116331aa7
12a31b13b
1364701b6
1440da675
152a5559b
hex1d39fff

30646271 has 4 divisors (see below), whose sum is σ = 30880344. Its totient is φ = 30412200.

The previous prime is 30646267. The next prime is 30646279. The reversal of 30646271 is 17264603.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17264603 = 137126019.

It is a cyclic number.

It is not a de Polignac number, because 30646271 - 22 = 30646267 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30646279) 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, 116840 + ... + 117101.

It is an arithmetic number, because the mean of its divisors is an integer number (7720086).

Almost surely, 230646271 is an apocalyptic number.

30646271 is a deficient number, since it is larger than the sum of its proper divisors (234073).

30646271 is a wasteful number, since it uses less digits than its factorization.

30646271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234072.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 30646271 is about 5535.9074233589. The cubic root of 30646271 is about 312.9386556518.

The spelling of 30646271 in words is "thirty million, six hundred forty-six thousand, two hundred seventy-one".

Divisors: 1 131 233941 30646271