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172123106 = 286061553
BaseRepresentation
bin10100100001001…
…10001111100010
3102222212202111212
422100212033202
5323030414411
625025110122
74160010431
oct1220461742
9388782455
10172123106
1189182701
1249788342
13298767bc
1418c07118
151019e68b
hexa4263e2

172123106 has 4 divisors (see below), whose sum is σ = 258184662. Its totient is φ = 86061552.

The previous prime is 172123103. The next prime is 172123111. The reversal of 172123106 is 601321271.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 118613881 + 53509225 = 10891^2 + 7315^2 .

It is not an unprimeable number, because it can be changed into a prime (172123103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43030775 + ... + 43030778.

Almost surely, 2172123106 is an apocalyptic number.

172123106 is a deficient number, since it is larger than the sum of its proper divisors (86061556).

172123106 is an equidigital number, since it uses as much as digits as its factorization.

172123106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86061555.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 172123106 is about 13119.5695813544. The cubic root of 172123106 is about 556.2624250728.

Adding to 172123106 its reverse (601321271), we get a palindrome (773444377).

The spelling of 172123106 in words is "one hundred seventy-two million, one hundred twenty-three thousand, one hundred six".

Divisors: 1 2 86061553 172123106