1240222331 has 4 divisors (see below), whose sum is σ = 1257211752. Its totient is φ = 1223232912.

The previous prime is 1240222289. The next prime is 1240222337. The reversal of 1240222331 is 1332220421.

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-1240222331 is a prime.

It is a super-2 number, since 2×1240222331² = 3076302860622147122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240222337) 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, 8494601 + ... + 8494746.

It is an arithmetic number, because the mean of its divisors is an integer number (314302938).

Almost surely, 2^1240222331 is an apocalyptic number.

1240222331 is a deficient number, since it is larger than the sum of its proper divisors (16989421).

1240222331 is an equidigital number, since it uses as much as digits as its factorization.

1240222331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16989420.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1240222331 is about 35216.7904698881. The cubic root of 1240222331 is about 1074.4012764086.

Adding to 1240222331 its reverse (1332220421), we get a palindrome (2572442752).

The spelling of 1240222331 in words is "one billion, two hundred forty million, two hundred twenty-two thousand, three hundred thirty-one".