2155575 has 24 divisors (see below), whose sum is σ = 3656016. Its totient is φ = 1120000.

The previous prime is 2155519. The next prime is 2155579. The reversal of 2155575 is 5755512.

It is not a de Polignac number, because 2155575 - 2⁶ = 2155511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155579) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2725 + ... + 3425.

It is an arithmetic number, because the mean of its divisors is an integer number (152334).

2^2155575 is an apocalyptic number.

2155575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2155575 is a deficient number, since it is larger than the sum of its proper divisors (1500441).

2155575 is a wasteful number, since it uses less digits than its factorization.

2155575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755 (or 750 counting only the distinct ones).

The product of its digits is 8750, while the sum is 30.

The square root of 2155575 is about 1468.1876583053. The cubic root of 2155575 is about 129.1777490780.

The spelling of 2155575 in words is "two million, one hundred fifty-five thousand, five hundred seventy-five".