1320533501 has 8 divisors (see below), whose sum is σ = 1512947904. Its totient is φ = 1129060800.

The previous prime is 1320533491. The next prime is 1320533503. The reversal of 1320533501 is 1053350231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1320533501 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 (1320533503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232415 + ... + 238028.

It is an arithmetic number, because the mean of its divisors is an integer number (189118488).

Almost surely, 2^1320533501 is an apocalyptic number.

It is an amenable number.

1320533501 is a deficient number, since it is larger than the sum of its proper divisors (192414403).

1320533501 is an equidigital number, since it uses as much as digits as its factorization.

1320533501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470851.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 1320533501 is about 36339.1455733345. The cubic root of 1320533501 is about 1097.1090759234.

Adding to 1320533501 its reverse (1053350231), we get a palindrome (2373883732).

The spelling of 1320533501 in words is "one billion, three hundred twenty million, five hundred thirty-three thousand, five hundred one".