225538778 has 16 divisors (see below), whose sum is σ = 357292320. Its totient is φ = 106480656.

The previous prime is 225538763. The next prime is 225538783. The reversal of 225538778 is 877835522.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2000 + ... + 21332.

It is an arithmetic number, because the mean of its divisors is an integer number (22330770).

Almost surely, 2^225538778 is an apocalyptic number.

225538778 is a deficient number, since it is larger than the sum of its proper divisors (131753542).

225538778 is a wasteful number, since it uses less digits than its factorization.

225538778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19661.

The product of its digits is 940800, while the sum is 47.

The square root of 225538778 is about 15017.9485283443. The cubic root of 225538778 is about 608.7052876267.

The spelling of 225538778 in words is "two hundred twenty-five million, five hundred thirty-eight thousand, seven hundred seventy-eight".