212201525 has 6 divisors (see below), whose sum is σ = 263129922. Its totient is φ = 169761200.

The previous prime is 212201513. The next prime is 212201537. The reversal of 212201525 is 525102212.

It is a happy number.

212201525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212201513) and next prime (212201537).

It can be written as a sum of positive squares in 3 ways, for example, as 49434961 + 162766564 = 7031^2 + 12758^2 .

It is not a de Polignac number, because 212201525 - 2¹² = 212197429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212201497 and 212201506.

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, 4244006 + ... + 4244055.

It is an arithmetic number, because the mean of its divisors is an integer number (43854987).

Almost surely, 2^212201525 is an apocalyptic number.

212201525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212201525 is a deficient number, since it is larger than the sum of its proper divisors (50928397).

212201525 is an equidigital number, since it uses as much as digits as its factorization.

212201525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8488071 (or 8488066 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 212201525 is about 14567.1385316403. The cubic root of 212201525 is about 596.4620729762.

Adding to 212201525 its reverse (525102212), we get a palindrome (737303737).

The spelling of 212201525 in words is "two hundred twelve million, two hundred one thousand, five hundred twenty-five".