172038355 has 4 divisors (see below), whose sum is σ = 206446032. Its totient is φ = 137630680.

The previous prime is 172038341. The next prime is 172038359. The reversal of 172038355 is 553830271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 553830271 = 23 ⋅24079577.

It is not a de Polignac number, because 172038355 - 2⁵ = 172038323 is a prime.

It is a super-2 number, since 2×172038355² = 59194391182212050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172038355.

It is not an unprimeable number, because it can be changed into a prime (172038359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17203831 + ... + 17203840.

It is an arithmetic number, because the mean of its divisors is an integer number (51611508).

Almost surely, 2^172038355 is an apocalyptic number.

172038355 is a deficient number, since it is larger than the sum of its proper divisors (34407677).

172038355 is an equidigital number, since it uses as much as digits as its factorization.

172038355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34407676.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 172038355 is about 13116.3392377599. The cubic root of 172038355 is about 556.1711114821.

The spelling of 172038355 in words is "one hundred seventy-two million, thirty-eight thousand, three hundred fifty-five".