1142220331 has 12 divisors (see below), whose sum is σ = 1353778272. Its totient is φ = 960571248.

The previous prime is 1142220307. The next prime is 1142220337. The reversal of 1142220331 is 1330222411.

It is a happy number.

It is not a de Polignac number, because 1142220331 - 2²³ = 1133831723 is a prime.

It is a super-2 number, since 2×1142220331² = 2609334569099499122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1142220299 and 1142220308.

It is not an unprimeable number, because it can be changed into a prime (1142220337) 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 11 ways as a sum of consecutive naturals, for example, 217315 + ... + 222508.

It is an arithmetic number, because the mean of its divisors is an integer number (112814856).

Almost surely, 2^1142220331 is an apocalyptic number.

1142220331 is a deficient number, since it is larger than the sum of its proper divisors (211557941).

1142220331 is an equidigital number, since it uses as much as digits as its factorization.

1142220331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439890 (or 439883 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1142220331 is about 33796.7503023590. The cubic root of 1142220331 is about 1045.3216902978.

Adding to 1142220331 its reverse (1330222411), we get a palindrome (2472442742).

The spelling of 1142220331 in words is "one billion, one hundred forty-two million, two hundred twenty thousand, three hundred thirty-one".