213689725 has 12 divisors (see below), whose sum is σ = 268170336. Its totient is φ = 168890480.

The previous prime is 213689701. The next prime is 213689731. The reversal of 213689725 is 527986312.

It is a de Polignac number, because none of the positive numbers 2^k-213689725 is a prime.

It is a super-3 number, since 3×213689725³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 49417 + ... + 53566.

It is an arithmetic number, because the mean of its divisors is an integer number (22347528).

Almost surely, 2^213689725 is an apocalyptic number.

213689725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213689725 is a deficient number, since it is larger than the sum of its proper divisors (54480611).

213689725 is a wasteful number, since it uses less digits than its factorization.

213689725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103076 (or 103071 counting only the distinct ones).

The product of its digits is 181440, while the sum is 43.

The square root of 213689725 is about 14618.1300103673. The cubic root of 213689725 is about 597.8531842800.

The spelling of 213689725 in words is "two hundred thirteen million, six hundred eighty-nine thousand, seven hundred twenty-five".