225117477 has 12 divisors (see below), whose sum is σ = 350182924. Its totient is φ = 138533760.

The previous prime is 225117469. The next prime is 225117479. The reversal of 225117477 is 774711522.

225117477 is a `hidden beast` number, since 2 + 2 + 511 + 74 + 77 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 46253601 + 178863876 = 6801^2 + 13374^2 .

It is not a de Polignac number, because 225117477 - 2³ = 225117469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225117479) 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 11 ways as a sum of consecutive naturals, for example, 961924 + ... + 962157.

Almost surely, 2^225117477 is an apocalyptic number.

It is an amenable number.

225117477 is a deficient number, since it is larger than the sum of its proper divisors (125065447).

225117477 is a wasteful number, since it uses less digits than its factorization.

225117477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1924100 (or 1924097 counting only the distinct ones).

The product of its digits is 27440, while the sum is 36.

The square root of 225117477 is about 15003.9153889910. The cubic root of 225117477 is about 608.3260357833.

Adding to 225117477 its reverse (774711522), we get a palindrome (999828999).

The spelling of 225117477 in words is "two hundred twenty-five million, one hundred seventeen thousand, four hundred seventy-seven".