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164447231 = 1342130047
BaseRepresentation
bin10011100110101…
…00001111111111
3102110102210012012
421303110033333
5314044302411
624152401435
74034530664
oct1163241777
9373383165
10164447231
118490a703
12470a627b
13280b9a70
1417ba9a6b
15e68518b
hex9cd43ff

164447231 has 8 divisors (see below), whose sum is σ = 177523584. Its totient is φ = 151431840.

The previous prime is 164447207. The next prime is 164447251. The reversal of 164447231 is 132744461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 164447231 - 26 = 164447167 is a prime.

It is a super-2 number, since 2×1644472312 = 54085783567134722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164447251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9551 + ... + 20496.

It is an arithmetic number, because the mean of its divisors is an integer number (22190448).

Almost surely, 2164447231 is an apocalyptic number.

164447231 is a deficient number, since it is larger than the sum of its proper divisors (13076353).

164447231 is a wasteful number, since it uses less digits than its factorization.

164447231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30481.

The product of its digits is 16128, while the sum is 32.

The square root of 164447231 is about 12823.6980235812. The cubic root of 164447231 is about 547.8674788777.

The spelling of 164447231 in words is "one hundred sixty-four million, four hundred forty-seven thousand, two hundred thirty-one".

Divisors: 1 13 421 5473 30047 390611 12649787 164447231