172247013 has 8 divisors (see below), whose sum is σ = 255180800. Its totient is φ = 114831324.

The previous prime is 172247011. The next prime is 172247041. The reversal of 172247013 is 310742271.

It is a happy number.

It is not a de Polignac number, because 172247013 - 2¹ = 172247011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 6379519 = 172247013 / (1 + 7 + 2 + 2 + 4 + 7 + 0 + 1 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172247011) 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 7 ways as a sum of consecutive naturals, for example, 3189733 + ... + 3189786.

It is an arithmetic number, because the mean of its divisors is an integer number (31897600).

Almost surely, 2^172247013 is an apocalyptic number.

It is an amenable number.

172247013 is a deficient number, since it is larger than the sum of its proper divisors (82933787).

172247013 is an equidigital number, since it uses as much as digits as its factorization.

172247013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6379528 (or 6379522 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 172247013 is about 13124.2909522762. The cubic root of 172247013 is about 556.3958727302.

Adding to 172247013 its reverse (310742271), we get a palindrome (482989284).

The spelling of 172247013 in words is "one hundred seventy-two million, two hundred forty-seven thousand, thirteen".