1224223402 has 4 divisors (see below), whose sum is σ = 1836335106. Its totient is φ = 612111700.

The previous prime is 1224223381. The next prime is 1224223411. The reversal of 1224223402 is 2043224221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2043224221 = 59 ⋅34630919.

It can be written as a sum of positive squares in only one way, i.e., 857845521 + 366377881 = 29289^2 + 19141^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306055849 + ... + 306055852.

Almost surely, 2^1224223402 is an apocalyptic number.

1224223402 is a deficient number, since it is larger than the sum of its proper divisors (612111704).

1224223402 is an equidigital number, since it uses as much as digits as its factorization.

1224223402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612111703.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 1224223402 is about 34988.9039839775. The cubic root of 1224223402 is about 1069.7613238862.

Adding to 1224223402 its reverse (2043224221), we get a palindrome (3267447623).

The spelling of 1224223402 in words is "one billion, two hundred twenty-four million, two hundred twenty-three thousand, four hundred two".