312155 has 8 divisors (see below), whose sum is σ = 378000. Its totient is φ = 247456.

The previous prime is 312121. The next prime is 312161. The reversal of 312155 is 551213.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312155 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 312155.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536 + ... + 954.

It is an arithmetic number, because the mean of its divisors is an integer number (47250).

2³¹²¹⁵⁵ is an apocalyptic number.

312155 is a deficient number, since it is larger than the sum of its proper divisors (65845).

312155 is a wasteful number, since it uses less digits than its factorization.

312155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573.

The product of its digits is 150, while the sum is 17.

The square root of 312155 is about 558.7083317797. The cubic root of 312155 is about 67.8354585772.

Adding to 312155 its reverse (551213), we get a palindrome (863368).

The spelling of 312155 in words is "three hundred twelve thousand, one hundred fifty-five".