1222242155 has 4 divisors (see below), whose sum is σ = 1466690592. Its totient is φ = 977793720.

The previous prime is 1222242143. The next prime is 1222242167. The reversal of 1222242155 is 5512422221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5512422221 = 347 ⋅15885943.

It is an interprime number because it is at equal distance from previous prime (1222242143) and next prime (1222242167).

It is a de Polignac number, because none of the positive numbers 2^k-1222242155 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122224211 + ... + 122224220.

It is an arithmetic number, because the mean of its divisors is an integer number (366672648).

Almost surely, 2^1222242155 is an apocalyptic number.

1222242155 is a deficient number, since it is larger than the sum of its proper divisors (244448437).

1222242155 is an equidigital number, since it uses as much as digits as its factorization.

1222242155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244448436.

The product of its digits is 3200, while the sum is 26.

The square root of 1222242155 is about 34960.5800152114. The cubic root of 1222242155 is about 1069.1839222460.

Adding to 1222242155 its reverse (5512422221), we get a palindrome (6734664376).

The spelling of 1222242155 in words is "one billion, two hundred twenty-two million, two hundred forty-two thousand, one hundred fifty-five".