213171125 has 8 divisors (see below), whose sum is σ = 266037720. Its totient is φ = 170536800.

The previous prime is 213171113. The next prime is 213171137. The reversal of 213171125 is 521171312.

It is an interprime number because it is at equal distance from previous prime (213171113) and next prime (213171137).

It can be written as a sum of positive squares in 4 ways, for example, as 22344529 + 190826596 = 4727^2 + 13814^2 .

It is not a de Polignac number, because 213171125 - 2¹⁶ = 213105589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213171125.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 852560 + ... + 852809.

It is an arithmetic number, because the mean of its divisors is an integer number (33254715).

Almost surely, 2^213171125 is an apocalyptic number.

213171125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213171125 is a deficient number, since it is larger than the sum of its proper divisors (52866595).

213171125 is an equidigital number, since it uses as much as digits as its factorization.

213171125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1705384 (or 1705374 counting only the distinct ones).

The product of its digits is 420, while the sum is 23.

The square root of 213171125 is about 14600.3809881797. The cubic root of 213171125 is about 597.3691525594.

The spelling of 213171125 in words is "two hundred thirteen million, one hundred seventy-one thousand, one hundred twenty-five".