1220443451 has 2 divisors, whose sum is σ = 1220443452. Its totient is φ = 1220443450.

The previous prime is 1220443439. The next prime is 1220443463. The reversal of 1220443451 is 1543440221.

It is a balanced prime because it is at equal distance from previous prime (1220443439) and next prime (1220443463).

It is a cyclic number.

It is not a de Polignac number, because 1220443451 - 2³⁰ = 146701627 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1220443451.

It is not a weakly prime, because it can be changed into another prime (1220443421) by changing a digit.

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 as a sum of consecutive naturals, namely, 610221725 + 610221726.

It is an arithmetic number, because the mean of its divisors is an integer number (610221726).

Almost surely, 2^1220443451 is an apocalyptic number.

1220443451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220443451 is an equidigital number, since it uses as much as digits as its factorization.

1220443451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 1220443451 is about 34934.8457990013. The cubic root of 1220443451 is about 1068.6591791045.

Adding to 1220443451 its reverse (1543440221), we get a palindrome (2763883672).

It can be divided in two parts, 12204 and 43451, that added together give a palindrome (55655).

The spelling of 1220443451 in words is "one billion, two hundred twenty million, four hundred forty-three thousand, four hundred fifty-one".