172255799 has 4 divisors (see below), whose sum is σ = 175920864. Its totient is φ = 168590736.

The previous prime is 172255789. The next prime is 172255819. The reversal of 172255799 is 997552271.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 997552271 = 9007 ⋅110753.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172255799 is a prime.

It is a super-3 number, since 3×172255799³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 3665017 = 172255799 / (1 + 7 + 2 + 2 + 5 + 5 + 7 + 9 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172255789) 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 3 ways as a sum of consecutive naturals, for example, 1832462 + ... + 1832555.

It is an arithmetic number, because the mean of its divisors is an integer number (43980216).

Almost surely, 2^172255799 is an apocalyptic number.

172255799 is a deficient number, since it is larger than the sum of its proper divisors (3665065).

172255799 is an equidigital number, since it uses as much as digits as its factorization.

172255799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3665064.

The product of its digits is 396900, while the sum is 47.

The square root of 172255799 is about 13124.6256708525. The cubic root of 172255799 is about 556.4053328092.

The spelling of 172255799 in words is "one hundred seventy-two million, two hundred fifty-five thousand, seven hundred ninety-nine".