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30911341 = 71435371
BaseRepresentation
bin111010111101…
…0101101101101
32011011110101111
41311322231231
530403130331
63022312021
7523512346
oct165725555
964143344
1030911341
11164a316a
12a428611
136533a46
1441690cd
152aa8db1
hex1d7ab6d

30911341 has 4 divisors (see below), whose sum is σ = 31346784. Its totient is φ = 30475900.

The previous prime is 30911329. The next prime is 30911359. The reversal of 30911341 is 14311903.

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 an emirpimes, since its reverse is a distinct semiprime: 14311903 = 15839041.

It is a cyclic number.

It is not a de Polignac number, because 30911341 - 29 = 30910829 is a prime.

It is a super-2 number, since 2×309113412 = 1911022004836562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30911381) 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 3 ways as a sum of consecutive naturals, for example, 217615 + ... + 217756.

It is an arithmetic number, because the mean of its divisors is an integer number (7836696).

Almost surely, 230911341 is an apocalyptic number.

It is an amenable number.

30911341 is a deficient number, since it is larger than the sum of its proper divisors (435443).

30911341 is an equidigital number, since it uses as much as digits as its factorization.

30911341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435442.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 30911341 is about 5559.7968488066. The cubic root of 30911341 is about 313.8383043774.

The spelling of 30911341 in words is "thirty million, nine hundred eleven thousand, three hundred forty-one".

Divisors: 1 71 435371 30911341