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BaseRepresentation
bin11010001111011…
…10111100011001
3120100012211002121
431013232330121
5422323143342
633502101241
75312040424
oct1507567431
9510184077
10220131097
1110329282a
126187a821
13367b52b4
14213429bb
15144d4067
hexd1eef19

220131097 has 4 divisors (see below), whose sum is σ = 220364496. Its totient is φ = 219897700.

The previous prime is 220131089. The next prime is 220131133. The reversal of 220131097 is 790131022.

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: 790131022 = 2395065511.

It is a cyclic number.

It is not a de Polignac number, because 220131097 - 23 = 220131089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220131047) 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, 115279 + ... + 117172.

It is an arithmetic number, because the mean of its divisors is an integer number (55091124).

Almost surely, 2220131097 is an apocalyptic number.

It is an amenable number.

220131097 is a deficient number, since it is larger than the sum of its proper divisors (233399).

220131097 is an equidigital number, since it uses as much as digits as its factorization.

220131097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233398.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 220131097 is about 14836.8155949988. The cubic root of 220131097 is about 603.8009601389.

The spelling of 220131097 in words is "two hundred twenty million, one hundred thirty-one thousand, ninety-seven".

Divisors: 1 947 232451 220131097