1226402213 has 4 divisors (see below), whose sum is σ = 1226492940. Its totient is φ = 1226311488.

The previous prime is 1226402207. The next prime is 1226402239. The reversal of 1226402213 is 3122046221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 464531809 + 761870404 = 21553^2 + 27602^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1226402213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226402413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20570 + ... + 53627.

It is an arithmetic number, because the mean of its divisors is an integer number (306623235).

Almost surely, 2^1226402213 is an apocalyptic number.

It is an amenable number.

1226402213 is a deficient number, since it is larger than the sum of its proper divisors (90727).

1226402213 is an equidigital number, since it uses as much as digits as its factorization.

1226402213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90726.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1226402213 is about 35020.0258851989. The cubic root of 1226402213 is about 1070.3955834912.

Adding to 1226402213 its reverse (3122046221), we get a palindrome (4348448434).

The spelling of 1226402213 in words is "one billion, two hundred twenty-six million, four hundred two thousand, two hundred thirteen".