1222540331 has 4 divisors (see below), whose sum is σ = 1226954112. Its totient is φ = 1218126552.

The previous prime is 1222540301. The next prime is 1222540379. The reversal of 1222540331 is 1330452221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222540331 is a prime.

It is a super-2 number, since 2×1222540331² = 2989209721843179122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222540297 and 1222540306.

It is not an unprimeable number, because it can be changed into a prime (1222540301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2206475 + ... + 2207028.

It is an arithmetic number, because the mean of its divisors is an integer number (306738528).

Almost surely, 2^1222540331 is an apocalyptic number.

1222540331 is a deficient number, since it is larger than the sum of its proper divisors (4413781).

1222540331 is an equidigital number, since it uses as much as digits as its factorization.

1222540331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4413780.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1222540331 is about 34964.8442152972. The cubic root of 1222540331 is about 1069.2708605728.

Adding to 1222540331 its reverse (1330452221), we get a palindrome (2552992552).

The spelling of 1222540331 in words is "one billion, two hundred twenty-two million, five hundred forty thousand, three hundred thirty-one".