213017725 has 6 divisors (see below), whose sum is σ = 264142010. Its totient is φ = 170414160.

The previous prime is 213017713. The next prime is 213017737. The reversal of 213017725 is 527710312.

It is an interprime number because it is at equal distance from previous prime (213017713) and next prime (213017737).

It can be written as a sum of positive squares in 3 ways, for example, as 412164 + 212605561 = 642^2 + 14581^2 .

It is not a de Polignac number, because 213017725 - 2²⁵ = 179463293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213017693 and 213017702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4260330 + ... + 4260379.

Almost surely, 2^213017725 is an apocalyptic number.

213017725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213017725 is a deficient number, since it is larger than the sum of its proper divisors (51124285).

213017725 is an equidigital number, since it uses as much as digits as its factorization.

213017725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8520719 (or 8520714 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 213017725 is about 14595.1267551878. The cubic root of 213017725 is about 597.2258273043.

The spelling of 213017725 in words is "two hundred thirteen million, seventeen thousand, seven hundred twenty-five".