1220316144 has 20 divisors (see below), whose sum is σ = 3152483496. Its totient is φ = 406772032.

The previous prime is 1220316133. The next prime is 1220316157. The reversal of 1220316144 is 4416130221.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12711579 + ... + 12711674.

Almost surely, 2^1220316144 is an apocalyptic number.

It is an amenable number.

1220316144 is an abundant number, since it is smaller than the sum of its proper divisors (1932167352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220316144 is a wasteful number, since it uses less digits than its factorization.

1220316144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25423264 (or 25423258 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1220316144 is about 34933.0236881951. The cubic root of 1220316144 is about 1068.6220197904.

Adding to 1220316144 its reverse (4416130221), we get a palindrome (5636446365).

The spelling of 1220316144 in words is "one billion, two hundred twenty million, three hundred sixteen thousand, one hundred forty-four".