312172245 has 128 divisors (see below), whose sum is σ = 705024000. Its totient is φ = 127284480.

The previous prime is 312172187. The next prime is 312172247. The reversal of 312172245 is 542271213.

It is not a de Polignac number, because 312172245 - 2⁶ = 312172181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312172247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 613051 + ... + 613559.

It is an arithmetic number, because the mean of its divisors is an integer number (5508000).

Almost surely, 2^312172245 is an apocalyptic number.

312172245 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

312172245 is an abundant number, since it is smaller than the sum of its proper divisors (392851755).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

312172245 is a wasteful number, since it uses less digits than its factorization.

312172245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600 (or 594 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 312172245 is about 17668.3967863527. The cubic root of 312172245 is about 678.3670774398.

The spelling of 312172245 in words is "three hundred twelve million, one hundred seventy-two thousand, two hundred forty-five".