1222355005 has 4 divisors (see below), whose sum is σ = 1466826012. Its totient is φ = 977884000.

The previous prime is 1222355003. The next prime is 1222355009. The reversal of 1222355005 is 5005532221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5005532221 = 197 ⋅25408793.

It can be written as a sum of positive squares in 2 ways, for example, as 157703364 + 1064651641 = 12558^2 + 32629^2 .

It is not a de Polignac number, because 1222355005 - 2¹ = 1222355003 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 (1222355003) 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, 122235496 + ... + 122235505.

It is an arithmetic number, because the mean of its divisors is an integer number (366706503).

Almost surely, 2^1222355005 is an apocalyptic number.

It is an amenable number.

1222355005 is a deficient number, since it is larger than the sum of its proper divisors (244471007).

1222355005 is an equidigital number, since it uses as much as digits as its factorization.

1222355005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244471006.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 1222355005 is about 34962.1939385960. The cubic root of 1222355005 is about 1069.2168272618.

Adding to 1222355005 its reverse (5005532221), we get a palindrome (6227887226).

It can be divided in two parts, 12223 and 55005, that multiplied together give a triangular number (672326115 = T₃₆₆₆₉).

The spelling of 1222355005 in words is "one billion, two hundred twenty-two million, three hundred fifty-five thousand, five".