172438331 has 8 divisors (see below), whose sum is σ = 186110400. Its totient is φ = 158824512.

The previous prime is 172438307. The next prime is 172438367. The reversal of 172438331 is 133834271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172438331 - 2⁶ = 172438267 is a prime.

It is a super-2 number, since 2×172438331² = 59469955996131122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172438391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8306 + ... + 20343.

It is an arithmetic number, because the mean of its divisors is an integer number (23263800).

Almost surely, 2^172438331 is an apocalyptic number.

172438331 is a deficient number, since it is larger than the sum of its proper divisors (13672069).

172438331 is a wasteful number, since it uses less digits than its factorization.

172438331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29125.

The product of its digits is 12096, while the sum is 32.

The square root of 172438331 is about 13131.5776279928. The cubic root of 172438331 is about 556.6017962981.

The spelling of 172438331 in words is "one hundred seventy-two million, four hundred thirty-eight thousand, three hundred thirty-one".