2155317 has 8 divisors (see below), whose sum is σ = 2896896. Its totient is φ = 1425312.

The previous prime is 2155297. The next prime is 2155319. The reversal of 2155317 is 7135512.

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

It is not a de Polignac number, because 2155317 - 2⁶ = 2155253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155319) 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, 2448 + ... + 3209.

It is an arithmetic number, because the mean of its divisors is an integer number (362112).

2^2155317 is an apocalyptic number.

It is an amenable number.

2155317 is a deficient number, since it is larger than the sum of its proper divisors (741579).

2155317 is a wasteful number, since it uses less digits than its factorization.

2155317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5787.

The product of its digits is 1050, while the sum is 24.

The square root of 2155317 is about 1468.0997922485. The cubic root of 2155317 is about 129.1725951262.

The spelling of 2155317 in words is "two million, one hundred fifty-five thousand, three hundred seventeen".