225777771 has 12 divisors (see below), whose sum is σ = 327927600. Its totient is φ = 149685840.

The previous prime is 225777757. The next prime is 225777787. The reversal of 225777771 is 177777522.

225777771 is a `hidden beast` number, since 2 + 2 + 577 + 7 + 7 + 71 = 666.

It is not a de Polignac number, because 225777771 - 2¹¹ = 225775723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (225777791) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67671 + ... + 70928.

It is an arithmetic number, because the mean of its divisors is an integer number (27327300).

Almost surely, 2^225777771 is an apocalyptic number.

225777771 is a deficient number, since it is larger than the sum of its proper divisors (102149829).

225777771 is a wasteful number, since it uses less digits than its factorization.

225777771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138786 (or 138783 counting only the distinct ones).

The product of its digits is 336140, while the sum is 45.

The square root of 225777771 is about 15025.9033339097. The cubic root of 225777771 is about 608.9202173304.

The spelling of 225777771 in words is "two hundred twenty-five million, seven hundred seventy-seven thousand, seven hundred seventy-one".