172078311 has 8 divisors (see below), whose sum is σ = 232862464. Its totient is φ = 113006520.

The previous prime is 172078259. The next prime is 172078331. The reversal of 172078311 is 113870271.

172078311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 172078311 - 2⁷ = 172078183 is a prime.

It is a super-2 number, since 2×172078311² = 59221890233225442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172078331) 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, 427855 + ... + 428256.

It is an arithmetic number, because the mean of its divisors is an integer number (29107808).

Almost surely, 2^172078311 is an apocalyptic number.

172078311 is a deficient number, since it is larger than the sum of its proper divisors (60784153).

172078311 is an equidigital number, since it uses as much as digits as its factorization.

172078311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856181.

The product of its (nonzero) digits is 2352, while the sum is 30.

The square root of 172078311 is about 13117.8622877358. The cubic root of 172078311 is about 556.2141651619.

The spelling of 172078311 in words is "one hundred seventy-two million, seventy-eight thousand, three hundred eleven".