1222226437 has 4 divisors (see below), whose sum is σ = 1225919296. Its totient is φ = 1218533580.

The previous prime is 1222226387. The next prime is 1222226443. The reversal of 1222226437 is 7346222221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7346222221 = 13 ⋅565094017.

It is a cyclic number.

It is not a de Polignac number, because 1222226437 - 2⁷ = 1222226309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222226399 and 1222226408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222223437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1845933 + ... + 1846594.

It is an arithmetic number, because the mean of its divisors is an integer number (306479824).

Almost surely, 2^1222226437 is an apocalyptic number.

It is an amenable number.

1222226437 is a deficient number, since it is larger than the sum of its proper divisors (3692859).

1222226437 is an equidigital number, since it uses as much as digits as its factorization.

1222226437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3692858.

The product of its digits is 16128, while the sum is 31.

The square root of 1222226437 is about 34960.3552184471. The cubic root of 1222226437 is about 1069.1793390012.

Adding to 1222226437 its reverse (7346222221), we get a palindrome (8568448658).

The spelling of 1222226437 in words is "one billion, two hundred twenty-two million, two hundred twenty-six thousand, four hundred thirty-seven".