1320223501 has 4 divisors (see below), whose sum is σ = 1321142400. Its totient is φ = 1319304604.

The previous prime is 1320223439. The next prime is 1320223517. The reversal of 1320223501 is 1053220231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1320223501 - 2⁹ = 1320222989 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 (1320221501) 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 3 ways as a sum of consecutive naturals, for example, 457291 + ... + 460168.

It is an arithmetic number, because the mean of its divisors is an integer number (330285600).

Almost surely, 2^1320223501 is an apocalyptic number.

It is an amenable number.

1320223501 is a deficient number, since it is larger than the sum of its proper divisors (918899).

1320223501 is an equidigital number, since it uses as much as digits as its factorization.

1320223501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918898.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 1320223501 is about 36334.8799502627. The cubic root of 1320223501 is about 1097.0232191011.

Adding to 1320223501 its reverse (1053220231), we get a palindrome (2373443732).

The spelling of 1320223501 in words is "one billion, three hundred twenty million, two hundred twenty-three thousand, five hundred one".