1222333478 has 4 divisors (see below), whose sum is σ = 1833500220. Its totient is φ = 611166738.

The previous prime is 1222333477. The next prime is 1222333481. The reversal of 1222333478 is 8743332221.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

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 (1222333477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305583368 + ... + 305583371.

It is an arithmetic number, because the mean of its divisors is an integer number (458375055).

Almost surely, 2^1222333478 is an apocalyptic number.

1222333478 is a deficient number, since it is larger than the sum of its proper divisors (611166742).

1222333478 is an equidigital number, since it uses as much as digits as its factorization.

1222333478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611166741.

The product of its digits is 48384, while the sum is 35.

The square root of 1222333478 is about 34961.8860761258. The cubic root of 1222333478 is about 1069.2105505349.

Adding to 1222333478 its reverse (8743332221), we get a palindrome (9965665699).

The spelling of 1222333478 in words is "one billion, two hundred twenty-two million, three hundred thirty-three thousand, four hundred seventy-eight".