1222555678 has 16 divisors (see below), whose sum is σ = 1854367344. Its totient is φ = 604454400.

The previous prime is 1222555673. The next prime is 1222555679. The reversal of 1222555678 is 8765552221.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222555673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118528 + ... + 128428.

It is an arithmetic number, because the mean of its divisors is an integer number (115897959).

Almost surely, 2^1222555678 is an apocalyptic number.

1222555678 is a deficient number, since it is larger than the sum of its proper divisors (631811666).

1222555678 is a wasteful number, since it uses less digits than its factorization.

1222555678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10587.

The product of its digits is 336000, while the sum is 43.

The square root of 1222555678 is about 34965.0636779057. The cubic root of 1222555678 is about 1069.2753348713.

The spelling of 1222555678 in words is "one billion, two hundred twenty-two million, five hundred fifty-five thousand, six hundred seventy-eight".