212261425 has 6 divisors (see below), whose sum is σ = 263204198. Its totient is φ = 169809120.

The previous prime is 212261389. The next prime is 212261531. The reversal of 212261425 is 524162212.

212261425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 34012224 + 178249201 = 5832^2 + 13351^2 .

It is not a de Polignac number, because 212261425 - 2¹⁹ = 211737137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 8490457 = 212261425 / (2 + 1 + 2 + 2 + 6 + 1 + 4 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212261425.

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, 4245204 + ... + 4245253.

Almost surely, 2^212261425 is an apocalyptic number.

212261425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212261425 is a deficient number, since it is larger than the sum of its proper divisors (50942773).

212261425 is an equidigital number, since it uses as much as digits as its factorization.

212261425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8490467 (or 8490462 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 212261425 is about 14569.1943840420. The cubic root of 212261425 is about 596.5181905699.

The spelling of 212261425 in words is "two hundred twelve million, two hundred sixty-one thousand, four hundred twenty-five".