172801331 has 4 divisors (see below), whose sum is σ = 172933464. Its totient is φ = 172669200.

The previous prime is 172801327. The next prime is 172801381. The reversal of 172801331 is 133108271.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 172801331 - 2² = 172801327 is a prime.

It is a super-2 number, since 2×172801331² = 59720599990743122, 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 172801331.

It is not an unprimeable number, because it can be changed into a prime (172801301) 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, 64085 + ... + 66726.

It is an arithmetic number, because the mean of its divisors is an integer number (43233366).

Almost surely, 2^172801331 is an apocalyptic number.

172801331 is a deficient number, since it is larger than the sum of its proper divisors (132133).

172801331 is a wasteful number, since it uses less digits than its factorization.

172801331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132132.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 172801331 is about 13145.3920063268. The cubic root of 172801331 is about 556.9920901120.

The spelling of 172801331 in words is "one hundred seventy-two million, eight hundred one thousand, three hundred thirty-one".