213611725 has 12 divisors (see below), whose sum is σ = 266788480. Its totient is φ = 169657200.

The previous prime is 213611719. The next prime is 213611743. The reversal of 213611725 is 527116312.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-213611725 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213611693 and 213611702.

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, 27261 + ... + 34210.

Almost surely, 2^213611725 is an apocalyptic number.

213611725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213611725 is a deficient number, since it is larger than the sum of its proper divisors (53176755).

213611725 is a wasteful number, since it uses less digits than its factorization.

213611725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61620 (or 61615 counting only the distinct ones).

The product of its digits is 2520, while the sum is 28.

The square root of 213611725 is about 14615.4618469619. The cubic root of 213611725 is about 597.7804335922.

It can be divided in two parts, 2136 and 11725, that added together give a triangular number (13861 = T₁₆₆).

The spelling of 213611725 in words is "two hundred thirteen million, six hundred eleven thousand, seven hundred twenty-five".