172203113 has 2 divisors, whose sum is σ = 172203114. Its totient is φ = 172203112.

The previous prime is 172203103. The next prime is 172203133. The reversal of 172203113 is 311302271.

It is an a-pointer prime, because the next prime (172203133) can be obtained adding 172203113 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169728784 + 2474329 = 13028^2 + 1573^2 .

It is a cyclic number.

It is not a de Polignac number, because 172203113 - 2²⁰ = 171154537 is a prime.

It is not a weakly prime, because it can be changed into another prime (172203103) 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 as a sum of consecutive naturals, namely, 86101556 + 86101557.

It is an arithmetic number, because the mean of its divisors is an integer number (86101557).

Almost surely, 2^172203113 is an apocalyptic number.

It is an amenable number.

172203113 is a deficient number, since it is larger than the sum of its proper divisors (1).

172203113 is an equidigital number, since it uses as much as digits as its factorization.

172203113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 172203113 is about 13122.6183743946. The cubic root of 172203113 is about 556.3485998171.

Adding to 172203113 its reverse (311302271), we get a palindrome (483505384).

The spelling of 172203113 in words is "one hundred seventy-two million, two hundred three thousand, one hundred thirteen".