1220523343 has 4 divisors (see below), whose sum is σ = 1314409768. Its totient is φ = 1126636920.

The previous prime is 1220523287. The next prime is 1220523391. The reversal of 1220523343 is 3433250221.

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

It is a cyclic number.

It is not a de Polignac number, because 1220523343 - 2¹³ = 1220515151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220523443) 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 in 3 ways as a sum of consecutive naturals, for example, 46943193 + ... + 46943218.

It is an arithmetic number, because the mean of its divisors is an integer number (328602442).

Almost surely, 2^1220523343 is an apocalyptic number.

1220523343 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1220523343 is a deficient number, since it is larger than the sum of its proper divisors (93886425).

1220523343 is an equidigital number, since it uses as much as digits as its factorization.

1220523343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93886424.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 1220523343 is about 34935.9892231492. The cubic root of 1220523343 is about 1068.6824972561.

Adding to 1220523343 its reverse (3433250221), we get a palindrome (4653773564).

The spelling of 1220523343 in words is "one billion, two hundred twenty million, five hundred twenty-three thousand, three hundred forty-three".