212630525 has 6 divisors (see below), whose sum is σ = 263661882. Its totient is φ = 170104400.

The previous prime is 212630521. The next prime is 212630533. The reversal of 212630525 is 525036212.

It can be written as a sum of positive squares in 3 ways, for example, as 24964 + 212605561 = 158^2 + 14581^2 .

It is not a de Polignac number, because 212630525 - 2² = 212630521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212630494 and 212630503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212630521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4252586 + ... + 4252635.

It is an arithmetic number, because the mean of its divisors is an integer number (43943647).

Almost surely, 2^212630525 is an apocalyptic number.

212630525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212630525 is a deficient number, since it is larger than the sum of its proper divisors (51031357).

212630525 is an equidigital number, since it uses as much as digits as its factorization.

212630525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8505231 (or 8505226 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 212630525 is about 14581.8560204111. The cubic root of 212630525 is about 596.8637508730.

Adding to 212630525 its reverse (525036212), we get a palindrome (737666737).

The spelling of 212630525 in words is "two hundred twelve million, six hundred thirty thousand, five hundred twenty-five".