172505233 has 4 divisors (see below), whose sum is σ = 172917360. Its totient is φ = 172093108.

The previous prime is 172505231. The next prime is 172505251. The reversal of 172505233 is 332505271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 172505233 - 2¹ = 172505231 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172505231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205435 + ... + 206272.

It is an arithmetic number, because the mean of its divisors is an integer number (43229340).

Almost surely, 2^172505233 is an apocalyptic number.

It is an amenable number.

172505233 is a deficient number, since it is larger than the sum of its proper divisors (412127).

172505233 is an equidigital number, since it uses as much as digits as its factorization.

172505233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412126.

The product of its (nonzero) digits is 6300, while the sum is 28.

The square root of 172505233 is about 13134.1247519582. The cubic root of 172505233 is about 556.6737697748.

The spelling of 172505233 in words is "one hundred seventy-two million, five hundred five thousand, two hundred thirty-three".