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231938041 = 1391668619
BaseRepresentation
bin11011101001100…
…01011111111001
3121011102200011211
431310301133321
5433334004131
635003123121
75514304126
oct1564613771
9534380154
10231938041
11109a17535
12658134a1
133908a45a
1422b3774d
15155675b1
hexdd317f9

231938041 has 4 divisors (see below), whose sum is σ = 233606800. Its totient is φ = 230269284.

The previous prime is 231938039. The next prime is 231938093. The reversal of 231938041 is 140839132.

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 231938041 - 21 = 231938039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231937994 and 231938012.

It is not an unprimeable number, because it can be changed into a prime (231938741) 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, 834171 + ... + 834448.

It is an arithmetic number, because the mean of its divisors is an integer number (58401700).

Almost surely, 2231938041 is an apocalyptic number.

It is an amenable number.

231938041 is a deficient number, since it is larger than the sum of its proper divisors (1668759).

231938041 is a wasteful number, since it uses less digits than its factorization.

231938041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668758.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 231938041 is about 15229.5121720953. The cubic root of 231938041 is about 614.4086597847.

The spelling of 231938041 in words is "two hundred thirty-one million, nine hundred thirty-eight thousand, forty-one".

Divisors: 1 139 1668619 231938041