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213931441 = 239301367
BaseRepresentation
bin11001100000001…
…01010110110001
3112220112211202201
430300011112301
5414231301231
633121143201
75205246553
oct1460052661
9486484681
10213931441
11aa838949
125b78ab01
1335424469
14205ab4d3
1513bac161
hexcc055b1

213931441 has 4 divisors (see below), whose sum is σ = 223232832. Its totient is φ = 204630052.

The previous prime is 213931427. The next prime is 213931489. The reversal of 213931441 is 144139312.

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 a cyclic number.

It is not a de Polignac number, because 213931441 - 25 = 213931409 is a prime.

It is a super-2 number, since 2×2139314412 = 91533322896672962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213931141) 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, 4650661 + ... + 4650706.

It is an arithmetic number, because the mean of its divisors is an integer number (55808208).

Almost surely, 2213931441 is an apocalyptic number.

It is an amenable number.

213931441 is a deficient number, since it is larger than the sum of its proper divisors (9301391).

213931441 is an equidigital number, since it uses as much as digits as its factorization.

213931441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9301390.

The product of its digits is 2592, while the sum is 28.

The square root of 213931441 is about 14626.3953522390. The cubic root of 213931441 is about 598.0785206901.

The spelling of 213931441 in words is "two hundred thirteen million, nine hundred thirty-one thousand, four hundred forty-one".

Divisors: 1 23 9301367 213931441