261214227 has 10 divisors (see below), whose sum is σ = 390209028. Its totient is φ = 174142764.

The previous prime is 261214193. The next prime is 261214229. The reversal of 261214227 is 722412162.

261214227 is a `hidden beast` number, since 2 + 612 + 1 + 42 + 2 + 7 = 666.

It is not a de Polignac number, because 261214227 - 2⁷ = 261214099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 261214227.

It is not an unprimeable number, because it can be changed into a prime (261214229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1612353 + ... + 1612514.

Almost surely, 2^261214227 is an apocalyptic number.

261214227 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

261214227 is a deficient number, since it is larger than the sum of its proper divisors (128994801).

261214227 is an equidigital number, since it uses as much as digits as its factorization.

261214227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3224879 (or 3224870 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 261214227 is about 16162.1232206663. The cubic root of 261214227 is about 639.2424524646.

Adding to 261214227 its reverse (722412162), we get a palindrome (983626389).

The spelling of 261214227 in words is "two hundred sixty-one million, two hundred fourteen thousand, two hundred twenty-seven".