216562525 has 12 divisors (see below), whose sum is σ = 269020852. Its totient is φ = 172938240.

The previous prime is 216562523. The next prime is 216562561. The reversal of 216562525 is 525265612.

It can be written as a sum of positive squares in 6 ways, for example, as 22629049 + 193933476 = 4757^2 + 13926^2 .

It is not a de Polignac number, because 216562525 - 2¹ = 216562523 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216562523) by changing a digit.

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, 6919 + ... + 21931.

Almost surely, 2^216562525 is an apocalyptic number.

216562525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216562525 is a deficient number, since it is larger than the sum of its proper divisors (52458327).

216562525 is a wasteful number, since it uses less digits than its factorization.

216562525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15600 (or 15595 counting only the distinct ones).

The product of its digits is 36000, while the sum is 34.

The square root of 216562525 is about 14716.0635021734. The cubic root of 216562525 is about 600.5204049821.

The spelling of 216562525 in words is "two hundred sixteen million, five hundred sixty-two thousand, five hundred twenty-five".