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163115141 = 723302163
BaseRepresentation
bin10011011100011…
…11000010000101
3102100221002220112
421232033002011
5313224141031
624104042405
74020312230
oct1156170205
9370832815
10163115141
118408a902
1246763405
1327a41647
1417940417
15e4c062b
hex9b8f085

163115141 has 4 divisors (see below), whose sum is σ = 186417312. Its totient is φ = 139812972.

The previous prime is 163115137. The next prime is 163115143. The reversal of 163115141 is 141511361.

It is a happy number.

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: 141511361 = 178379367.

It is a cyclic number.

It is not a de Polignac number, because 163115141 - 22 = 163115137 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 (163115143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11651075 + ... + 11651088.

It is an arithmetic number, because the mean of its divisors is an integer number (46604328).

Almost surely, 2163115141 is an apocalyptic number.

It is an amenable number.

163115141 is a deficient number, since it is larger than the sum of its proper divisors (23302171).

163115141 is an equidigital number, since it uses as much as digits as its factorization.

163115141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23302170.

The product of its digits is 360, while the sum is 23.

The square root of 163115141 is about 12771.6538083366. The cubic root of 163115141 is about 546.3841493719.

The spelling of 163115141 in words is "one hundred sixty-three million, one hundred fifteen thousand, one hundred forty-one".

Divisors: 1 7 23302163 163115141