212222275 has 6 divisors (see below), whose sum is σ = 263155652. Its totient is φ = 169777800.

The previous prime is 212222189. The next prime is 212222291. The reversal of 212222275 is 572222212.

It is not a de Polignac number, because 212222275 - 2¹⁵ = 212189507 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: 8488891 = 212222275 / (2 + 1 + 2 + 2 + 2 + 2 + 2 + 7 + 5).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4244421 + ... + 4244470.

Almost surely, 2^212222275 is an apocalyptic number.

212222275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

212222275 is a deficient number, since it is larger than the sum of its proper divisors (50933377).

212222275 is an equidigital number, since it uses as much as digits as its factorization.

212222275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8488901 (or 8488896 counting only the distinct ones).

The product of its digits is 2240, while the sum is 25.

The square root of 212222275 is about 14567.8507337218. The cubic root of 212222275 is about 596.4815139056.

Adding to 212222275 its reverse (572222212), we get a palindrome (784444487).

The spelling of 212222275 in words is "two hundred twelve million, two hundred twenty-two thousand, two hundred seventy-five".