213775 has 12 divisors (see below), whose sum is σ = 281232. Its totient is φ = 160640.

The previous prime is 213751. The next prime is 213791. The reversal of 213775 is 577312.

213775 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213775 - 2⁹ = 213263 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 174 + ... + 676.

It is an arithmetic number, because the mean of its divisors is an integer number (23436).

2²¹³⁷⁷⁵ is an apocalyptic number.

213775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

213775 is a deficient number, since it is larger than the sum of its proper divisors (67457).

213775 is a wasteful number, since it uses less digits than its factorization.

213775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530 (or 525 counting only the distinct ones).

The product of its digits is 1470, while the sum is 25.

The square root of 213775 is about 462.3580863357. The cubic root of 213775 is about 59.7932700114.

The spelling of 213775 in words is "two hundred thirteen thousand, seven hundred seventy-five".