311172 has 12 divisors (see below), whose sum is σ = 726096.
Its totient is φ = 103720.
The previous prime is 311153. The next prime is 311173. The reversal of 311172 is 271113.
It is a tau number, because it is divible by the number of its divisors (12).
It is not an unprimeable number, because it can be changed into a prime (311173) by changing a digit.
311172 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12954 + ... + 12977.
It is an arithmetic number, because the mean of its divisors is an integer number (60508).
2311172 is an apocalyptic number.
It is an amenable number.
311172 is an abundant number, since it is smaller than the sum of its proper divisors (414924).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
311172 is a wasteful number, since it uses less digits than its factorization.
311172 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 25938 (or 25936 counting only the distinct ones).
The product of its digits is 42, while the sum is 15.
The square root of 311172 is about 557.8279304588.
The cubic root of 311172 is about 67.7641773501.
Adding to 311172 its reverse (271113), we get a palindrome (582285).
It can be divided in two parts, 3 and 11172, that added together give a triangular number (11175 = T149).
The spelling of 311172 in words is "three hundred eleven thousand, one hundred seventy-two", and thus it is an iban number.