211426225 has 6 divisors (see below), whose sum is σ = 262168550. Its totient is φ = 169140960.

The previous prime is 211426223. The next prime is 211426261. The reversal of 211426225 is 522624112.

211426225 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 70576801 + 140849424 = 8401^2 + 11868^2 .

It is not a de Polignac number, because 211426225 - 2¹ = 211426223 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: 8457049 = 211426225 / (2 + 1 + 1 + 4 + 2 + 6 + 2 + 2 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 211426225.

It is not an unprimeable number, because it can be changed into a prime (211426223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4228500 + ... + 4228549.

Almost surely, 2^211426225 is an apocalyptic number.

211426225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

211426225 is a deficient number, since it is larger than the sum of its proper divisors (50742325).

211426225 is an equidigital number, since it uses as much as digits as its factorization.

211426225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8457059 (or 8457054 counting only the distinct ones).

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

The square root of 211426225 is about 14540.5029142736. The cubic root of 211426225 is about 595.7347747500.

The spelling of 211426225 in words is "two hundred eleven million, four hundred twenty-six thousand, two hundred twenty-five".